Question

In class in class 10 A there are 20 boys and 22 girls in 10 B there are 15 boys and 25 girls one student is to be selected from each class 1.find the probability of both girls? 2. find the probability of both the boys? 3. what is the probability of one boy and one girl?

pls answer fast it's urgent...... ​

Answer 1

Answer:

(1) answer will be 2/47

(2) answer will be 2/35

(3) answer will be

Answer 2

(1) probability of both girls = 32.73%

(2) probability of both boys = 17.85%

(3) probability of one boy and one girl = 24.46%

Step-by-step explanation:

In the class 10 A number of boys = 20 and number of girls = 22

Total number of students in 10 A = 20 + 22 = 42

In the class 10 B number of boys = 15 and number of girls = 25

Total number of students in 10 B = 15 + 25 = 40

Probability of choosing girl from 10 A = $\frac{22}{42}$

Probability of choosing girl from 10 B = $\frac{25}{40}$

(1) Probability of both girls = $\frac{22}{42}\times \frac{25}{40}$

                                           =  $\frac{55}{168}$ = 0.327380 or 32.73%

Probability of choosing boy from 10 A = $\frac{20}{42}$

Probability of choosing boy from 10 B = $\frac{15}{40}$

(2) Probability of both boys = $\frac{20}{42}\times \frac{15}{40}$

                                            = $\frac{5}{28}$ = 0.178571  or 17.85%

Total boys = 35, and total girls = 47, total students = 82

(3) Probability of one boy and one girl = $\frac{47}{82}\times \frac{35}{82}$

                                                          = $\frac{1645}{6724}$

                                                          = 0.24464 or 24.46%

(1) probability of both girls = 32.73%

(2) probability of both boys = 17.85%

(3) probability of one boy and one girl = 24.46%

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