Question

of five of th
of the sixth boy.
7. The mean of the marks scored by 50 students was found to be 39. Later
on it was discovered that a score of 43 was misread as 23. Find the
correct mean.
8. The mean of 24 numbers is 35. If 3 is added to each number, what will
be the new mean?
9. The mean of 20 numbers is 43. If 6 is subtracted from each of th
numbers, what will be the new mean?
10. The mean of 15 numbers is 27. If each number is multiplied by 4, wh
will be the mean of the new numbers?
11. The mean of 12 numbers is 40. If each number is divided by 8, what w
be the mean of the new numbers?
12. The mean of 20 numbers is 18. If 3 is added to each of the first
numbers, find the mean of the new set of 20 numbers.​

Answer 1

Step-by-step explanation:

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