The price of a set of airpods is 139 plus 8 sales tax what is the sales tax on this set of headphones in dollars and cents

37.5%

Step-by-step explanation:

The computation is shown below:

Here we assume that the 1st, 2nd and 3rd child be the triplet and it could be either a girl or boy

Now

B = Boy

G = Girl

The possible triplets are

(BBB) (BBG) (BGB) (BGG) (GBB) (GBG) (GGB) (GGG)

These are 8 triplets

Now find the sets that involves 2 boys and a girl

(BBG) (BGB) (GBB)

Now the probability is

P = 3 ÷ 8

= 37.5%