Question

The table shows some information about the lifetimes, t, in
hours, of some lightbulbs.
Lifetime
Frequency
25 51
50 47
100 34
150 47
200 0
250 50
300 43
Estimate the mean lifetime of a bulb.
Give your answer rounded to 2 DP.

PLZZ HELP !

Answer 1

just add up all the hours and divide by the number of light bulbs. goodluck!!