Question: Leon knows that his first four test grades were 78 86 82 and 88 Use the formula x =x 1 +x 2 +...+x n n

Leon knows that his first four test grades were

78

86

82

and 88

Use the formula x

=x

1

+x

2

+...+x

n

n

x

=

x

1

+

x

2

+

...

+

x

n

n

to find Leon's grade on the fifth test if his test average is 83.8

83.8

.

.

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