2- bromo butane 15%aq soln of EtOH−−−−−−−−−−−−→P In this reaction 70% recemisation takesplace % of inverted product would be:
30
70
35
65
In 70% recemisation: 35% Retention 35% inverted ∴ Total product = 65%
The mean weight of 70 Students in a class is 60 kgs. The mean weight of boys is 70 kgs while that of girls is 50 kgs.
Find the number of boys in the class.