NCERT Solutions for Chapter: Statistics and Probability, Exercise 1: Exercise

Median of the following numbers:  $4, 4, 5, 7, 6, 7, 7, 12, 3$ is

Mode of the data $15, 14, 19, 20, 14, 15, 16, 14, 15, 18, 14, 19, 15, 17, 15$ is

In a sample study of $642$ people, it was found that $514$ people have a high school certificate. If a person is selected at random, the probability that the person has a high school certificate is

In a survey of $364$ children aged $19-36$ months, it was found that $91$ liked to eat potato chips. If a child is selected at random, the probability that he/she does not like to eat potato chips be:

In a medical examination of students of a class, the following blood groups are recorded.

A student is selected at random from the class. The probability that he or she has blood group $\mathrm{B}$ is

Two coins are tossed $1000$ times and the outcomes are recorded as below:

Based on the information, the probability for at most one head is

$80$ bulbs are selected at random from a lot and their life time (in hrs) is recorded in the form of a frequency table given below:

One bulb is selected at random from the lot. The probability that its life is $1150$ hours, is

$80$ bulbs are selected at random from a lot and their lifetime (in hours) is recorded in the form of frequency table given below.

The probability that bulbs selected randomly from the lot has a lifetime less than $900$ hours is