Nisha secured 73,86,78 and 75 marks in four tests. What is the least number marks she secured in her next test, if she has to have a mean score of 80 marks in five tests?
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Answered by
30
Answer: 88
Step-by-step explanation:
Let, the least number to secure is x
∴ 73 + 86 + 78 + 75 + x / 5 = 80
= 312 + x/5 = 80
= x = 400 – 312
= 88
Hence, the least number of marks is 88.
Answered by
5
mean =73+86+78+75+x/5=80
73+86+78+75+x=400
302+x=400
x=98
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