WAEC - Biology (1994 - No. 31)
What is the theoretical probability that a normal male child will be born?
1\2
1\4
1\3
1
2\3
توضیح
probability ( normal child) = \(\frac{ no of normal children }{ total no of children}\) = \(\frac{ 2}{4}\) = \(\frac{1}{2}\)