The average of 2 number is 20 and their standard deviation 5. Find the two numbers? (a) 15, 25 (b) 30, 40 (c) 10,15 (d) None of these
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Answered by
21
(a) 15, 25
Average = Sum of all observations/
No. of observations
= 15 + 25 / 2
= 40 / 2
= 20
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4
A) option is correct option
fasion:
hii
sonu
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