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ioda
2 years ago
7

A class consists of 60 boys and 40 girls. If two students are chosen at random, what is the probability that i) both are boys ii

) both are girls iii) one boy and one girl? ​
Mathematics
1 answer:
alukav5142 [94]2 years ago
5 0
B: boys, g: girls
Without replacement

i) P(b and b) = 60/100 * 59/ 99 = 59/165 = 0.358
ii) P(g and g) = 40/100 * 39/99 = 0.158
iii) we can solve this question using hyper geometric distribution:
(60C1 * 40C1)/ 100C2 = 0.48
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