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Start learning 50% faster. Sign in nowFrom statement I: People becomes 9 from 7, and average decreases by 5. Let ‘n’ is previous average and then ‘n - 5’ is new average. So Sum of ages of 2 new people becomes 9 × (n – 5) – 7 × n which is given 25 So 9 × (n – 5) – 7 × n = 25 So 9n – 45 – 7n = 25 or 2n = 25+45= 70 So, n = 70/2 = 35 So average of new group = 35 – 5 = 30 From statement II: Total age of 7 people is 245 years, so their average = 245/7 = 35 So, average of new group = 35 – 5 = 30 So answer can be determined by either of statement I or II.
217 210 236 299 423 640
...12, 27, 44, 68, 94
82, 65, 59, 64, 80, 113
Find the wrong number in given number series.
2658, 2654, 2681, 2645, 2999, 2918
96, 480, 120, 360, 150, 750
Find the wrong no in the given number series.
3, 7, 15, 31, 63, 127, 255
412, 320, 241, 169, 106, 52
3,10,27,4,16,64,5,25,125