Day | Duration of exercise (min) |
Sunday | 40 |
Monday | 50 |
Tuesday | 60 |
Wednesday | x |
Thursday | 30 |
Friday | 90 |
Saturday | 90 |
A) \[60\text{ }min\]
B) \[30\text{ }min\]
C) \[55\text{ }min\]
D) \[65\text{ }min\]
Correct Answer: A
Solution :
(a): Average duration \[=\frac{40+50+60+x+30+90+90}{7}=60\] \[\Rightarrow \,150+x+210=60\times 7\Rightarrow x+360=420\] \[\Rightarrow \,x=60\]You need to login to perform this action.
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