The average height of 10 students is 155 cm. Later on it is discovered that while calculating the average, the reading of 157 cm was wrongly read as 147 cm. The correct average is
Correct answer: D. 156
- A. 196
- B. 154
- C. 200
- D. 156
Explanation
A, B, C are incorrect, as 156cm is the correct average height. D is correct as the total height of 10 students = 10 x 155 = 1550 cm. Since 157cm was incorrectly read as 147 cm, 1550 - 147 + 157 = 15601560/10 = 156 cm
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