The average of 10 numbers is 40.2. Later it is found that two numbers have been wrongly added. The first one is 18 greater than the actual number and the second number added is 13 instead of 33. Find the correct average -

A 40.2

B 40.6

C 40.4

D 40.8

Solution

Correct Answer: Option C

এখানে,
ভুল যোগটির উত্তর =10×40.2=402
প্রকৃত যোগফল =(402-18+33-13)
=404

সঠিক গড় =404/10=40.4

Solution

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