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41 . A sum of money at compound Interest doubts in 4 yrs. In how many years will the sum increase to 32 times of itself?
(A). 20 yrs
(B). 25 yrs
(C). 30 yrs
(D). 32 yrs
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42 . Pawan has a certain average score in 12th innings. In the 13th inning he scores 80 runs and thereby decrease his average by 4 runs. Then after 13th inning his new average is –
(A). 132
(B). 139
(C). 147
(D). 128
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