Question

• If 8 is the mean of 4, 7, a, 8, 10, 12, find 'a'. Bhai yahe question hai jaldi batao aur kisko nhi aataa wo dur bhag jao​

Answer 1

Because there are 6 numbers in total, including the variable,so,

7+4+8+10+12= 41

8x6= 48

48-41= 7

a=7

Answer 2

Step-by-step explanation:

$mean = \binom{sum \: of \: all \: numbers}{total \: numbers} \: \\ mean = \: \binom{4 + 7 + a + 8 + 10 + 12}{6} \\ mean \: = \: \binom{41 + a}{6} \\ mean \: = \binom{8}{1} \\ a = 7$

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