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Nikolay [14]
3 years ago
12

The average of 7 numbers is 45.If the last two numbers are 27 and 43 what is the average of the first five

Mathematics
1 answer:
Paul [167]3 years ago
4 0

Answer:

49

Step-by-step explanation:

The average is calculated as

average = \frac{sum}{count} Given the average of 7 numbers is 45 , then

\frac{sum}{7} = 45 ( multiply both sides by 7 )

sum of 7 numbers = 315

Subtract 27, 43 from the sum to obtain the sum of first 5 numbers

315 - (27 + 43) = 315 - 70 = 245 , then

average of first 5 numbers = \frac{245}{5} = 49

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