Question

The mean of numbers 2,5,2x, and 7 is less or equal to 5. Find the range of values of X .

Answer 1

Answer:

Mean= no. of observation ÷ Total no. of observation

now putting the values in the formula

Now, 7= (2+5+2x+7) ÷ 4

7×4 = (14+2x)

28 = (14+2x)

2x= 28-14

2x=14

x= 14÷2

x=7

so the actual values are 2,5,14,7 (i.e. 2,5,2×7,7)

now arrange the numbers in ascending order then we get, 2,5,7,14

Range = highest value- lowest value

Range= 14-2

Range=12

I hope this will help u..

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