Practice30Create account

Each of 7 numbers with mean 14 is multiplied by 3, and then 2 is subtracted from each result. What is the new mean?

Class 9Measures of Central TendencyStatistics and Probability
  • A36
  • B44
  • C80
  • D40

Step-by-Step Solution

If old mean is , the new mean of values is .
Answer: D) 40

Master this chapter in 30 minutes a day.

Don't just memorise the answer — build a daily practice habit.

Practice 5 Similar Questions Free →

All Measures of Central Tendency practice questions

More Class 9 Measures of Central Tendency practice

The ages (in years) of 6 members of a family are 8, 12, 35, 38, 40 and 65. The father…For 11 observations the mean is 50. If the mean of the first 6 observations is 49 and…In the data set 5, 8, x, 12, 15 (already in increasing order), the median equals the…A cricket player scored runs in 6 innings: 45, 0, 78, 45, 60, 45. If his coach removes…The frequency table shows runs scored by students in a quiz: Score 2 occurs 3 times,…