The average of some natural numbers is 15. If 30 is added to first number and 5 is subtracted from the last number the average becomes 17.5 then the number of natural number is
A20
B10
C30
D15
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Related Questions:
The average of first 119 odd natural numbers, is:
10 സംഖ്യകളുടെ ശരാശരി 20 ആയാൽ ഓരോസംഖ്യയുടെയും കൂടെ 2 ഗുണിച്ചാൽ പുതിയ ശരാശരി എത്ര?
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The sum of five numbers is 655. The average of the first two numbers is 78 and the third number is 104. Find the average of the remaining two numbers?