exam Maths Puzzle Numerical Ability

A family has five children. The probablilty of having a girl is 1/2. What is the probability of having no more than 3 boys?

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The numnber of moose varied inversely as the number of bears and directly as the number of bison. When there were 75 moose, there were 85 bears and 15 bison
10^6x-3=100,000