The heights (in cm) of 5 plants are 12, 15, 18, 21, 24. If a 6th plant of height 18 cm is added, what happens to the mea...

Type: MCQ • Marks: 1

The heights (in cm) of 5 plants are 12, 15, 18, 21, 24. If a 6th plant of height 18 cm is added, what happens to the mean height?

A. It becomes 20 cm.

B. It decreases.

C. It increases.

D. It remains 18 cm.

Explanation

Initial mean = (12+15+18+21+24)/5 = 90/5 = 18 cm. Adding a value equal to the mean (18) keeps the new mean unchanged (108/6 = 18 cm).

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Class 7th Ganita Prakash 2

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