Question

in class 10a there are 20 boys and 15 girls. In class 10b there are 15 boys and 25 girls. One student from each class is to be selected for a competition. What is the probability of atleast one girl
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Answer 1

Answer:

38 girls if 2 were selected for compitition and 35 boys

Answer 2

Given-:

in class 10a there are 20 boys and 15 girls. In class 10b there are 15 boys and 25 girls. One student from each class is to be selected for a competition. What is the probability of atleast one girl

To Find-:

What is the probability of atleast one girl

Answer-:

Total number of students = 80

i. Probability of both being girl.

For both being a girl i.e. girl is selected from class 10A and another girl is selected from class 10B

Total number of girls = 45

Probability of both being girls

$= \frac{Total \: Number \: Of \: Girls}{Total \: Number \: Of \: Students}$

$- > \frac{45}{80} = \frac{9}{16}$

${\underline {\underline{ \bold{Answer - > 0.5625}}}}$

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