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50 students enter for a school javelin throw competition. The distance (in metre) thrown are recorded below (i) Construct a cumulative frequency table. (ii) Draw a cumulative frequency curve (less than type) and calculate the median distance drawn by using this curve. (iii) Calculate the median distance by using the formula for median. (iv) Are [...]

The nucleus opf tritium contains (a) 1 proton +1 neutron (b) 1 proton + 3 neutron (c) 1 proton + 0 neutron (d) 1 proton + 2 neutron The nucleus opf tritium contains (a) 1 proton +1 neutron (b) 1 proton + 3 neutron (c) 1 proton + 0 neutron (d) 1 proton + 2 [...]

The following is the frequency distribution of duration for 100 calls made on a mobile phone. Calculate the average duration ( in sec ) of a call and also find the median from a cumulative frequency curve. Find the mean of the distribution November 26, 2020 Category: Chapter 14 - Statistics , Chapter 15 - [...]

The annual rainfall record of a city for 66 days is given in the following table. Calculate the median rainfall using ogives (of more than type and of less than type) The annual rainfall record of a city for 66 days is given in the following table. Calculate the median rainfall using ogives (of more [...]

The mass number of an anion, X^3- , is 14. If there are ten electrons in the anion, the number of neutrons in the nucleus of atom , X2 of the element will be is 14. If there are ten electrons in the anion The mass number of an anion the number of neutrons in [...]

Size of agricultural holdings in a survey of 200 families is given in the following Compute median and mode size of the holdings. Size of agricultural holdings in a survey of 200 families is given in the following Compute median and mode size of the holdings. November 26, 2020 Category: Chapter 14 - Statistics , [...]

A particle starts moving from rest at t=0 with a tangential acceleration of constant magnitude of π m/s2 along a circle of radius 6 m. The value of average acceleration, average velocity and average speed during the first 2√3‾a of motion, are respectively A particle starts moving from rest at t=0 with a tangential acceleration [...]

Two identical balls 1 and 2 are tied to two strings as shown in figure. They are rotated about point O. Ball 1 is observed from ball 2, centrifugal force on ball 1 is F1,ball 2 is observed from ball 1 and centrifugal force on ball 2 is F2, then ball 2 is observed from [...]

The distribution of heights (in cm) of 96 children is given below Draw a less than type cumulative frequency curve for this data and use it to compute median height of the children. The distribution of heights (in cm) of 96 children is given below Draw a less than type cumulative frequency curve for this [...]

The median of the following data is 50. Find the values of p and q, if the sum of all the frequencies is 90. if the sum of all the frequencies is 90. The median of the following data is 50. Find the values of p and q November 26, 2020 Category: Chapter 14 - [...]