Solve question 26 plzz 23. The mean age Of a combined group Of men and women is 30.5 years. If the mean age ot the group
of is 35 and that Ot the group Of Women is 25, tind Out the percentage ot men and women in the
Uhere are men and group}
24. The mean weight of 150 students in a class is 60 kg. The mean of boys in the class is 70 kg and that
of girls is 55 kg. Find the number ot boys and girls in the class.
Corrected Mean
25. The average weight of a group of 20 boys was calculated to be 89.4. It was later discovered that one
weight was misread as 78 kg instead of the correct one of 87 kg. Calculate the correct average weight.
{Correct average weight = 89.85 kg}
26. The mean of 100 observations was found to be 40. Later on, it was discovered that two items were
wrongly taken as 30 and 27 instead of 3 and 72. Find correct mean.
{Correct rnean 40.18}
27. The average height of a group of 40 students was calculated as 155 cm. It was later discovered that
the height Of one student was read as 157 instead Of 137 cm. Calculate the correct average height.
(Correct average height '54.5
Weighted Mean
28. From the following data, calculate the weighted mean.
62
2
77
65
2
57
62
3
4
{Weighted mean = 62 marts