self Maths Puzzle Numerical Ability Averages

Three companies working independently are saving 20%, 25% and 35% of their earnings. If these companies combine and work what would be the net percentage of savings?

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self Other Question

19 persons went to a hotel for a combined dinner party. 13 of them spent Rs 79 each for the dinner and the rest spent Rs 4 more than the average expenditure of all the 19. What was the total money spent by them?

(a)Rs1628.40 (b)Rs1536 (c)Rs1492 (d)none of these A school having four classes only have student strength of 10, 20, 30 and 40 respectively. The pass percentages of these classes are 20%, 30%, 60% and 100% respectively. What is the pass percentage for the entire school?

(a)56% (b)76% (c)34% (d)66%