26 to nearest year
We require the total of the sums of ages for both groups before calculating the mean for all 16
using mean = [tex]\frac{sum}{count}[/tex]
Women
27 = [tex]\frac{sum }{9}[/tex] ( cross- multiply )
sum = 9 × 27 = 243
Men
25 = [tex]\frac{sum}{7}[/tex] ( cross- multiply )
sum = 7 × 25 = 175
Total sum of all 16 = 243 + 175 = 418
mean = [tex]\frac{418}{16}[/tex] = 26 ( to nearest year )
