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Quantitative Aptitude Objective Questions { Average }

57. The average age of 8 men is increased by 2 years when two of them whose ages are 21 years and 23 years are replaced by two new men. The average age of the two new men is:
A.22 years
B.24 years
C.28 years
D.30 years
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58. The average of five conecutive numbers is n. If the next two numbers are also included, the average will :
A.remain the same
B.increase by 1
C.increase by 1.4
D.increase by 2
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59. A cricketer has a certain average for 10 innings. In the eleventh inning, he scored 108 runs, thereby increasing his average by 6 runs. His new average is :
A.48 runs
B.52 runs
C.55 runs
D.60 runs
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60. A cricketer whose bowling average is 12.4 runs per wicket takes 5 wickets for 26 runs and thereby decreases his average by 0.4. The number of wickets taken by him till the last match was:
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61. A team of 8 persons joins in a shooting competition. The best marksman scored 85 points. If he had scored 92 points, the average score for the team would have been 84. The number of points, the team scored was
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62. A motorist travels to a place 150 km away at an average speed of 50 km / hr and returns at 30 km / hr. His average speed for the whole journey in km / hr is :
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63. The average weight of 3 men A, B and C is 84 kg. Another man D joins the group and the average now becomes 80 kg. If another man E, whose weight is 3 kg more than that of D, replaces A, then the average weight of B, C, D and E becomes 79 kg. The weight of A is :
A.70 kg
B.72 kg
C.75 kg
D.80 kg
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