Questions
. If the mean of the distribution is 2.6, then the value of y is
| Variate x | 1 | 2 | 3 | 4 | 5 |
| Frequency f of x | 4 | 5 | y | 1 | 2 |
a
24
b
13
c
8
d
3
detailed solution
Correct option is C
Mean =∑i=1n fixi∑i=1n fi∴ 2.6=1×4+2×5+3×y+4×1+5×24+5+y+1+2⇒ 31.2+2.6y=28+3y⇒ 0.4y=3.2⇒ y=8Talk to our academic expert!
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