Question

in a class 70% are boys and 30% of girls 5% of boys 3% of girls are irregular to the classes what is the probability of the student selected at random in regular at the classes and what is the probability that the irregular student in a girls

Answer 1

Answer:

There are 70 boys and 30 girls in a class of 100.

20 boys and 10 girls are players.

Probability that a player is a girl = P(player) * P(girl) = 20+10/100∗30/100=9/100

So 9% chance of a player and a girl.

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Answer 2

total student=100%
student irragular=8%
=100/8
12.5%
in girs=3%
total=30%
=30/3
=10%