Question

in class 10A, there are 20 boys and 20 girls.In 10B, there are 15 boys and 25 girls. One student is to be selected from each class.
(1) What is the probability of both being girls?
(2) What is the probability of both being boys?
(3) What is the probability of one boy and one girl?
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Answer 1

Answer:

both being girls is 45

both being boys is 35

Answer 2

a) $\dfrac{9}{16}$ , b) $\dfrac{7}{16}$ , c) 1.

Step-by-step explanation:

Since we have given that

In class 10A,

Number of boys = 20

Number of girls = 20

In class 10B,

Number of boys = 15

Number of girls = 25

(1) What is the probability of both being girls?

So, Probability of both being girls would be

$\dfrac{20}{80}+\dfrac{25}{80}=\dfrac{45}{80}=\dfrac{9}{16}$

(2) What is the probability of both being boys?

So, probability of both being boys would be

$\dfrac{20}{80}+\dfrac{15}{80}=\dfrac{35}{80}=\dfrac{7}{16}$

(3) What is the probability of one boy and one girl?

$\dfrac{35}{80}+\dfrac{45}{80}=\dfrac{35+45}{80}=\dfrac{80}{80}=1$

Hence, a) $\dfrac{9}{16}$ , b) $\dfrac{7}{16}$ , c) 1.

# learn more:

In class 10A,there are 30 boys and 20 girls.in 10B,there are 15 boys and 25 girls.one student is to be selected from each class.

a) what is the peobability of both being girls?

b) what is the probability of both being boys?

c) what is the probability of one boy and one girls?

https://brainly.in/question/14297973