Question

#22 on attached photo

Step 1

a)

If there are n scores, ith score can be represented as Xi (X subscript i) ie the first score (i = 1) can be represented as X1 ( X subscript 1) and second score (i =2) can be represented as X2( X subscript 2).

Adding scores from X1 to Xn and then squaring the sum can be represented as shown below.

Step 2

b)

Squaring each score from X1 to Xn and then taking sum of squared values can be represented as shown below.

Step 3

c)

Subtracting 2 from each score and then adding result...

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