NCERT Class 9
5. An organisation selected 2400 families at random and surveyed them to determine a relationship between income level and the number of vehicles in a family. The information gathered is listed in the table below: Suppose a family is chosen. Find the probability that the family chosen is (i) earning ₹10000 – 13000 per month and owning exactly 2 vehicles. (ii) earning ₹16000 or more per month and owning exactly 1 vehicle. (iii) earning less than ₹7000 per month and does not own any vehicle. (iv) earning ₹13000 – 16000 per month and owning more than 2 vehicles. (v) owning not more than 1 vehicle.
17
Oct
5. An organisation selected 2400 families at random and surveyed them to determine a relationship between income level and the number of vehicles in a family. The information gathered is listed in the table below: Suppose a family is chosen. Find the probability that the family chosen is (i) earning ₹10000 – 13000 per month [...]
4. Three coins are tossed simultaneously 200 times with the following frequencies of different outcomes: If the three coins are simultaneously tossed again, compute the probability of 2 heads coming up.
17
Oct
4. Three coins are tossed simultaneously 200 times with the following frequencies of different outcomes: If the three coins are simultaneously tossed again, compute the probability of 2 heads coming up. 4. Three coins are tossed simultaneously 200 times with the following frequencies of different outcomes: If the three coins are simultaneously tossed again compute [...]
3. Refer to Example 5, Section 14.4, Chapter 14. Find the probability that a student of the class was born in August.
17
Oct
3. Refer to Example 5, Section 14.4, Chapter 14. Find the probability that a student of the class was born in August. 3. Refer to Example 5 Chapter 14. Find the probability that a student of the class was born in August. Section 14.4 October 17, 2020 Category: Chapter 15 - Probability , Maths , [...]
2. 1500 families with 2 children were selected randomly, and the following data were recorded: Compute the probability of a family, chosen at random, having (i) 2 girls (ii) 1 girl (iii) No girl Also check whether the sum of these probabilities is 1.
17
Oct
2. 1500 families with 2 children were selected randomly, and the following data were recorded: Compute the probability of a family, chosen at random, having (i) 2 girls (ii) 1 girl (iii) No girl Also check whether the sum of these probabilities is 1. 2. 1500 families with 2 children were selected randomly and the [...]
1. In a cricket match, a batswoman hits a boundary 6 times out of 30 balls she plays. Find the probability that she did not hit a boundary.
17
Oct
1. In a cricket match, a batswoman hits a boundary 6 times out of 30 balls she plays. Find the probability that she did not hit a boundary. 1. In a cricket match a batswoman hits a boundary 6 times out of 30 balls she plays. Find the probability that she did not hit a [...]
6. Give one example of a situation in which (i) the mean is an appropriate measure of central tendency. (ii) the mean is not an appropriate measure of central tendency but the median is an appropriate measure of central tendency.
17
Oct
6. Give one example of a situation in which (i) the mean is an appropriate measure of central tendency. (ii) the mean is not an appropriate measure of central tendency but the median is an appropriate measure of central tendency. 2. In a mathematics test given to 15 students 39 40 42 46 48 5^2 [...]
Tags:
2. In a mathematics test given to 15 students ,
39 ,
40 ,
42 ,
46 ,
48 ,
5^2 ,
54 ,
60 Find the mean ,
62 ,
96 ,
98 ,
median and mode of this data. ,
the following marks (out of 100) are recorded: 41 ,
5. Find the mean salary of 60 workers of a factory from the following table:
17
Oct
5. Find the mean salary of 60 workers of a factory from the following table: 5. Find the mean salary of 60 workers of a factory from the following table: October 17, 2020 Category: Chapter 14 - Statistics , Maths , NCERT Class 9 ,
4. Find the mode of 14, 25, 14, 28, 18, 17, 18, 14, 23, 22, 14, 18.
17
Oct
4. Find the mode of 14, 25, 14, 28, 18, 17, 18, 14, 23, 22, 14, 18. -22 14 17 18 23 25 28 4. Find the mode of 14 October 17, 2020 Category: Chapter 14 - Statistics , Maths , NCERT Class 9 ,
3. The following observations have been arranged in ascending order. If the median of the data is 63, find the value of x. 29, 32, 48, 50, x, x+2, 72, 78, 84, 95
17
Oct
3. The following observations have been arranged in ascending order. If the median of the data is 63, find the value of x. 29, 32, 48, 50, x, x+2, 72, 78, 84, 95 3^2 3. The following observations have been arranged in ascending order. If the median of the data is 63 48 50 7^2 [...]
2. In a mathematics test given to 15 students, the following marks (out of 100) are recorded: 41, 39, 48, 52, 46, 62, 54, 40, 96, 52, 98, 40, 42, 52, 60 Find the mean, median and mode of this data.
17
Oct
2. In a mathematics test given to 15 students, the following marks (out of 100) are recorded: 41, 39, 48, 52, 46, 62, 54, 40, 96, 52, 98, 40, 42, 52, 60 Find the mean, median and mode of this data. 2. In a mathematics test given to 15 students 39 40 42 46 48 [...]
Tags:
2. In a mathematics test given to 15 students ,
39 ,
40 ,
42 ,
46 ,
48 ,
5^2 ,
54 ,
60 Find the mean ,
62 ,
96 ,
98 ,
median and mode of this data. ,
the following marks (out of 100) are recorded: 41 ,