Multiple choice

The average height of 5 boys is 175 cm. A sixth boy joined the group and the average height of all the boys in the group now increased by one centimeter. The height of the sixth boy is:

  1. 180 cm

  2. 181 cm

  3. 179 cm

  4. 171 cm
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Total height of 5 boys = 5 × 175 = 875 cm. After adding the 6th boy, new average = 176 cm, so total height of 6 boys = 6 × 176 = 1056 cm. Height of 6th boy = 1056 - 875 = 181 cm. Option B is correct.

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