| \[x\] | 4 | 8 | 6 | 7 |
| \[f\] | 11 | 2 | 3 | p |
A) 1.7
B) 3
C) 6.8
D) 4
Correct Answer: D
Solution :
Given mean = 5.3 We know that mean \[=\frac{\sum\limits_{i=1}^{n}{{{f}_{i}}{{x}_{i}}}}{\sum\limits_{i=1}^{n}{{{f}_{i}}}}\] \[\therefore \]\[\frac{4\times 11+8\times 2+6\times 3+7p}{11+2+3+p}=5.3\] \[\Rightarrow \]\[p=\frac{6.8}{1.7}=4\]
You need to login to perform this action.
You will be redirected in
3 sec
