19) A pen which costs $180 is being sold at a profit of 10%. The amount of the profit is
(A) $1.80
(B) $10.00
(C) $18.00
(D) $198.00​

(C)    $18.00

Step-by-step explanation:

10% = 0.1

180 * 0.1 = 18

(C) $18.00

step-by-step explanation:

15% chance.

step-by-step explanation:

3/10 times, the 5 year old will get a tablet. 5/10 times, the 13 yer old will get a tablet. multiply both fractions to get 15/100 times, both would have a tablet.