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If the average of 15, 25, 19, 20, 23, 18 and (x-3) is 20. then Find the average of x, (x+6), (2x-1) and 23. |
20 27 $28\frac{1}{2}$ 30 |
30 |
Average of 15, 25, 19, 20, 23, 18 and (x-3) is 20 Average = (15+25+19+20+23+18+x-3)/7 = 20 x+117 = 140 x = 23 average of x, (x+6), (2x-1) and 23 = (23+29+45+23)/4 = 120/4 The correct answer is Option (4) → 30 |
