It is commonly assumed that 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 probability they have one boy and one girl?

49.97% probability they have one boy and one girl.

Step-by-step explanation:

For each children, we have these following probabilities

0.513 = 51.3% probability of being a boy

1-0.513 = 0.487 = 48.7% probability of being a girl

If a family has two children (not twins), what is the probability they have one boy and one girl?

It can be either a boy and then a girl, or a girl than a boy.

So

49.97% probability they have one boy and one girl.

i did it myself and i got 4.2 (b) hope its right

step-by-step explanation:

y < -3

step-by-step explanation:

-3y - 2 > 7

-3y -2 + 2 > 7+2

-3y > 9

-3y/-3 < 9/-3   (change the inequality sign when multiplying or dividing by a negative number)

y < -3