Acollection of dimes is arranged in a triangular array with 17 coins in the base row, 16 in the next, 15 in the next, and so forth.

Good evening ,

Step-by-step explanation:

1+2+3+...+17 =  (17×18)/2 = (17×18)÷2 = 153 dimes.

it’s the sum of 17 terms of a geometric series.

:)

answer: a. 13/44

step-by-step explanation: judging by the information given to us, we are looking for experimental probability. we can see that 13 males have chosen chocolate ice cream. there are 44 ice creams in total (remember that the total is always the denominator). so our answer is 13/44.

so, converting firstly the mixed fractions to improper fractions and then "adding".