Question

Mean of 15 students height is 155 cm, if height of each student is increased by 2 cm, new
mean will be:
B. 159
A. 157
D. 163
25
C. 161​

Answer 1

Answer:

option A 157

Step-by-step explanation:

• sum of heights of all the students is 15×155 i.e.,2325cm
• if all students are increased by 2 cm, then the sum sum of the heights of the students is 2325+30=2355
• mean of heights of students is 2355/15
• therefore ,new mean will be: 157

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