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igor_vitrenko [27]
2 years ago
14

The names of 9 boys and 2 girls in a hat. What is the probability of first drawing a girls name then a boys name from the hat?

Mathematics
1 answer:
Damm [24]2 years ago
3 0
A - drawing a girls name at first
P(A) = 2/(2+9) = 2/11
B - drawing a boys name in second drawing if first drawing was a girls name
P(B) = 9/10
C - drawing a girls name firstly and a boys name secondly
P(C) = P(A) * P(B) = 2/11 * 9/10 = 9/55
ans: 9/55
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