There are 17 men and 26 women in a choir. The choir is going to sing at a concert.
One of the men and one of the women are going to be chosen to make a pair to sing the first song.
(a) Work out the number of different pairs that can be chosen.

(2)
Two of the men are to be chosen to make a pair to sing the second song.
Ben thinks the number of different pairs that can be chosen is 136
Mark thinks the number of different pairs that can be chosen is 272
(b) Who is correct, Ben or Mark?
Give a reason for your answer.

i just need help on b why is it 17x16 and then divide by 2 ? like why divide by 2 why not leave it as 17x16

this is a very good question

step-by-step explanation:

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the answer is mp

step-by-step explanation:

step-by-step explanation:

given that ab is divided into equal parts as

ac, cd, de, ef, fg, gh, hi, ib.

from this we find that f is the midpoint of ab.

so using mid point formula we find

f = (3,7)

similarly considering fb, we get

h = mid point of fb = ((6,6) and g, mid point of fh is

g = (9/2, 13/2)

i is mid point of hb

so i =(15/2,11/2)

you first to choose the points and then move from then as the slope you have