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प्रश्न
If the mean of 6, 4, 7, ‘a’ and 10 is 8. Find the value of ‘a’
बेरीज
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उत्तर
No. of terms = 5
Mean = 8
Sum of numbers = 8 × 5 = 40 ...(i)
But, sum of number = 6 + 4 + 7 + a + 10 = 27 + a ...(ii)
From (i) and (ii)
27 + a = 40
a = 13
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