Multiple choice

Six friends have an average height of 167 cm. A boy with height 162 cm leaves the group. Find the new average height.

  1. 168 cm

  2. 166 cm

  3. 169 cm

  4. 167 cm
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A Correct answer
Explanation

Original sum = 6 * 167 = 1002. New sum = 1002 - 162 = 840. New average = 840 / 5 = 168.

AI explanation

Using the basic average formula, the total height of the six friends is 6 times 167 cm, which equals 1002 cm. After the boy with a height of 162 cm leaves, the new total height of the remaining five friends is 1002 minus 162, resulting in 840 cm. Dividing this new total by 5 gives the new average height of 168 cm.

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