# Solution - Probability - an Experimental Approach

Account
Register

Share

Books Shortlist
ConceptProbability - an Experimental Approach

#### Question

 Blood Group Number of Students A 9 B 6 AB 3 O 12 Total 30

The above frequency distribution table represents the blood groups of 30 students of a class. Use this table to determine the probability that a student of this class, selected at random, has blood group AB.

#### Solution

You need to to view the solution
Is there an error in this question or solution?

#### Similar questions VIEW ALL

1500 families with 2 children were selected randomly, and the following data were recorded:-

 Number of girls in a family 2 1 0 Number of families 475 814 211

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.

view solution

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.

view solution

A teacher wanted to analyse the performance of two sections of students in a mathematics test of 100 marks. Looking at their performances, she found that a few students got under 20 marks and a few got 70 marks or above. So she decided to group them into intervals of varying sizes as follows: 0 − 20, 20 − 30… 60 − 70, 70 − 100. Then she formed the following table:-

 Marks Number of students 0 - 20 7 20 - 30 10 30 - 40 10 40 - 50 20 50 - 60 20 60 - 70 15 70 - above 8 Total                               90

(i) Find the probability that a student obtained less than 20 % in the mathematics test.

(ii) Find the probability that a student obtained marks 60 or above.

view solution

Eleven bags of wheat flour, each marked 5 kg, actually contained the following weights of flour (in kg):-

4.97, 5.05, 5.08, 5.03, 5.00, 5.06, 5.08, 4.98, 5.04, 5.07, 5.00

Find the probability that any of these bags chosen at random contains more than 5 kg of flour.

view solution

To know the opinion of the students about the subject statistics, a survey of 200 students was conducted. The data is recorded in the following table.

 Opinion Number of students like 135 dislike 65

Find the probability that a student chosen at random

(i) likes statistics, (ii) does not like it

view solution

#### BooksVIEW ALL [1]

Solution for concept: Probability - an Experimental Approach. For the course 8th-10th CBSE
S