Most people think babies are equally likely to come as either a boy or a girl. This is not true. Actually, about 51.3% of all babies are boys. If a family has two children (not twins), what is the chance that both children are boys

26.3 %

Explanation:

In the given question,

The probability of boys is given that is - 51.3%

Therefore the probability of girls will be = 100- 51.3

                                                                  = 49.7%

The 51.3% probability of boys per thousand individual can be expressed as 513/1000= 0.513 P(B)

The 49.7% probability of girls per thousand individuals can be expressed as 497/1000= 0.497 P(G)

Now to calculate the probability that the first ans second child both are boys

We will fuse formula= P(B) x P(B)

                                 =    0.513 x  0.513

                                  = 0.263

Thus, 26.3 % is correct.