**Statistics and Probability Practice Problems for Grade 10 :**

Here we are going to see, some practice questions on statistics and probability.

(1) The mean of the following frequency distribution is 62.8 and the sum of all frequencies is 50. Compute the missing frequencies f_{1} and f_{2}.

(2) The diameter of circles (in mm) drawn in a design are given below

Calculate the standard deviation. Solution

(3) The frequency distribution is given below.

(4) The standard deviation of some temperature data in degree celsius (^{o}C) is 5. If the data were converted into degree Farenheit (^{o}F) then what is the variance? Solution

(5) If for a distribution, Σ(x −5) = 3, Σ(x −5)^{2} = 43,and total number of observations is 18, find the mean and standard deviation Solution

(6) Prices of peanut packets in various places of two cities are given below. In which city, prices were more stable?

(7) If the range and coefficient of range of the data are 20 and 0.2 respectively, then find the largest and smallest values of the data. Solution

(8) If two dice are rolled, then find the probability of getting the product of face value 6 or the difference of face values 5. Solution

(9) In a two children family, find the probability that there is at least one girl in a family. Solution

(10) A bag contains 5 white and some black balls. If the probability of drawing a black ball from the bag is twice the probability of drawing a white ball then find the number of black balls. Solution

(11) The probability that a student will pass the final examination in both English and Tamil is 0.5 and the probability of passing neither is 0.1. If the probability of passing the English examination is 0.75, what is the probability of passing the Tamil examination? Solution

(12) The King, Queen and Jack of the suit spade are removed from a deck of 52 cards. One card is selected from the remaining cards. Find the probability of getting (i) a diamond (ii) a queen (iii) a spade (iv) a heart card bearing the number 5. Solution

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