SSC Government Jobs Exams Numerical Ability Averages

Out of 4 numbers, whose average is 60, the first one is one-fourth of the sum of the last three. The first number is

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Sum/4 = 60
Sum = 60*4 = 240
Let the 1st number be x
Sum of the four numbers = x+4x = 5x
5x=240
x=48
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SSC Other Question

The incomes of A, B and C are in the ratio 7: 9 : 12 and their spending are in the ratio 8 : 9 : 15. If A saves 1/4 th of his income, then the saving of A, B and C are in the ratio of The average of 25 observations is 13. It was later found that an observation 73 was wrongly entered as 48. The new average is