The mean of 10 numbers is 32 . If one number is excluded, mean of the remaining numbers become 30 . Find the excluded number.
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Answer:50
Step-by-step explanation:
Mean of 10 numbers = 32.
Total sum of numbers = 32 x 10
=320
After 1 number is reduced,two is taken away.
This means that Mean of 9 numbers = 32 - 2
= 30.
Therefore the total sum of numbers = 9 x 30
= 270.
Therefore the excluded number = 320 - 270
= 50.
Hence the excluded number = 50.
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