Chapter 15 – Probability
2. While computing mean of grouped data, we assume that the frequencies are
26
Nov
2. While computing mean of grouped data, we assume that the frequencies are 2. While computing mean of grouped data we assume that the frequencies are November 26, 2020 Category: Chapter 14 - Statistics , Chapter 15 - Probability , Maths , NCERT Class 10 ,
Choose the correct answer from the given four options: 1. In the formula x = a + ∑fidi/∑fi For finding the mean of grouped data di’s are deviations from a of
26
Nov
Choose the correct answer from the given four options: 1. In the formula x = a + ∑fidi/∑fi For finding the mean of grouped data di’s are deviations from a of Choose the correct answer from the given four options: 1. In the formula x = a + ∑fidi/∑fi For finding the mean of grouped [...]
Two dice, one blue and one grey, are thrown at the same time. Write down all the possible outcomes. What is the probability that the sum of the two numbers appearing on the top of the dice is(i) 8 ? (ii) 13?(iii) less than or equal to 12?
06
Oct
Two dice, one blue and one grey, are thrown at the same time. Write down all the possible outcomes. What is the probability that the sum of the two numbers appearing on the top of the dice is(i) 8 ? (ii) 13?(iii) less than or equal to 12? Harpreet tosses two different coins simultaneously (say [...]
A carton consists of 100 shirts of which 88 are good, 8 have minor defects and 4 have major defects. Jimmy, a trader, will only accept the shirts which are good, but Sujata, another trader, will only reject the shirts which have major defects. One shirt is drawn at random from the carton. What is the probability that (i) It is acceptable to Jimmy? (ii) It is acceptable to Sujata ?
06
Oct
A carton consists of 100 shirts of which 88 are good, 8 have minor defects and 4 have major defects. Jimmy, a trader, will only accept the shirts which are good, but Sujata, another trader, will only reject the shirts which have major defects. One shirt is drawn at random from the carton. What is [...]
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8 have minor defects and 4 have major defects. Jimmy ,
A carton consists of 100 shirts of which 88 are good ,
a trader ,
another trader ,
but Sujata ,
will only accept the shirts which are good ,
will only reject the shirts which have major defects. One shirt is drawn at random from the carton. What is the probability that (i) It is acceptable to Jimmy? (ii) It is acceptable to Sujata ? ,
A missing helicopter is reported to have crashed somewhere in the rectangular region shown in fig. What is the probability that it crashed inside the lake shown in the figure?
06
Oct
A missing helicopter is reported to have crashed somewhere in the rectangular region shown in fig. What is the probability that it crashed inside the lake shown in the figure? A missing helicopter is reported to have crashed somewhere in the rectangular region shown in fig. What is the probability that it crashed inside the [...]
In a musical chair game, the person playing the music has been advised to stop playing the music at any time within 2 minutes after he starts playing. What is the probability that the music will stop within the first half minute after starting?
06
Oct
In a musical chair game, the person playing the music has been advised to stop playing the music at any time within 2 minutes after he starts playing. What is the probability that the music will stop within the first half minute after starting? A die is thrown twice. What is the probability that (i) [...]
Harpreet tosses two different coins simultaneously (say, one is of Rs. 1 and other of Rs. 2). What is the probability that he gets at least one head?
06
Oct
Harpreet tosses two different coins simultaneously (say, one is of Rs. 1 and other of Rs. 2). What is the probability that he gets at least one head? Harpreet tosses two different coins simultaneously (say one is of Rs. 1 and other of Rs. 2). What is the probability that he gets at least one [...]
There are 40 students in class X of a school of whom 25 are girls and 15 are boys. The class teacher has to select one student as a class representative. She writes the name of each student on a separate card, the cards being identical. Then she puts cards in a bag and stirs them thoroughly. She then draws one card from the bag. What is the probability that the name written on the card is the name of (i) a girl? (ii) a boy?
06
Oct
There are 40 students in class X of a school of whom 25 are girls and 15 are boys. The class teacher has to select one student as a class representative. She writes the name of each student on a separate card, the cards being identical. Then she puts cards in a bag and stirs [...]
Savita and Hamida are friends. What is the probability that both will have a) different birthdays? b) the same birthday (ignoring a leap year).
06
Oct
Savita and Hamida are friends. What is the probability that both will have a) different birthdays? b) the same birthday (ignoring a leap year). Savita and Hamida are friends. What is the probability that both will have a) different birthdays? b) the same birthday (ignoring a leap year). October 6, 2020 Category: Chapter 15 - [...]
Two players, Sangeeta and Reshma, play a tennis match. It is known that the probability of Sangeeta’s winning the match is 0.62. What is the probability of Reshma’s winning the match?
06
Oct
Two players, Sangeeta and Reshma, play a tennis match. It is known that the probability of Sangeeta’s winning the match is 0.62. What is the probability of Reshma’s winning the match? play a tennis match. It is known that the probability of Sangeeta's winning the match is 0.62. What is the probability of Reshma's winning [...]