Question

the average of 7 numbers is 49 . The 6 numbers are 29,30,55,62,43 and 48. Find the seventh number?
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Answer 1

Answer:

76

Step-by-step explanation:

the total of the numbers = average×number of numbers.

hence 49×7=343=total of the numbers

the total of the six numbers is 267, hence the missing number is 343-267=76..

Answer 2

Given;

the average of 7 numbers is 49 . The 6 numbers are 29,30,55,62,43 and 48.

To find;

seventh number..

Solution;

let the seventh no. be x

then,

total observation/total no. count= Average of no.

$\frac{29 + 30 + 55 + 62 + 43 + 48 + x}{7} = 49$

$\frac{267x}{7} = 49$

$x = 49 \times \frac{7}{267}$

$x = \frac{343}{267}$

$x = 1.28$

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