Solution
We take the mid-value of each interval for the calculation of mean of the given distribution.
$$\therefore\ $$Mean = $$\frac{\left(15\times5\right)+\left(25\times10\right)+\left(35\times7\right)+\left(45\times8\right)}{5+10+7+8}=\frac{930}{30}=31$$
Hence, the correct answer is Option B
Get AI Help
Create a FREE account and get:
- Download Maths Shortcuts PDF
- Get 300+ previous papers with solutions PDF
- 500+ Online Tests for Free
Book Free CAT Mentorship
Get personalized CAT strategy from a 99%iler
500+ students mentored
OTP Verification
Enter the 6-digit code sent to your phone
Booking Summary
Session:Free CAT Mentorship
Phone:
Date:
Time:
Enter OTP
Didn't receive the OTP?
