parveen took 5 tests and his average score so far is 80,if he gets 100 on the reamaing 3 tests,,find his new average?
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Answer:
His new average would be 87.5
Step-by-step explanation:
In general:
Average = Sum of all observations / Total no. of observations
=> Sum of all observations = Average * Total no. of observations
In this sum:
Praveen's average marks in 5 tests = 80
Total marks in 5 tests = 80 * 5 = 400 .........(i)
ATQ, in each of the remaining three tests, Praveen gets 100.
=> Total marks in remaining 3 tests = 300 ........(ii)
From (i) and (ii), total marks in 8 tests = 400 + 300 = 700
=> Average marks in all 8 tests = 700 / 8 = 87.5
Praveen's new average of eight tests would be 87.5
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