300311
In a colony, the mean age of all the males is 15 years, and the mean age of all females is 19 years. Find the condition that must be true about the mean age m of the combined group of male and female in colony:
1 M = 17
2 M > 17
3 M < 17
4 15 < M < 19
Explanation:
15 < M < 19 Given is that mean age of all males is 15 years and age of all females is 19 years in a colony, when we find the mean age mm of the combined group of males and females in colony, we can conclude that mean age will be more than 15 but less than. so 15 < m < 19