Nisha secured 73,86,78 and 75 mark in four tests. What is the least number of points she can secure in her next test if she is to have an average of 80?
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Sum total in 4 tests = 73+86+78+75 = 312
Average for 5 tests = 80
Sum total in 5 tests = 80*5 = 400
[avg = sum total/number of observations]
Hence, the marks to be secured in 5th test = 400 - 312 = 88
Hope it helps
Average for 5 tests = 80
Sum total in 5 tests = 80*5 = 400
[avg = sum total/number of observations]
Hence, the marks to be secured in 5th test = 400 - 312 = 88
Hope it helps
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