
Can you please explain this question?
Can you please explain this question?
a) Boys RH : Boys LH = 2 : 33
48 รท 2 x 33 = 792 right-handed boys
b) Number of left-handed pupils โ 48 + 42
= 90 left-handed pupils
Since 95% of students are right-handed,
5% = 90
1% = 18
100% = 1800 students in total
Total number of boys โ 792 + 48
= 840 boys
Total number of girls โ 1800 – 840
= 960 girls
Total no. of girls : Total no. of boys : Total number of pupils
960 : 840 : 1800
48 : 42 : 90
8 : 7 : 15
c) Since the total number of girls increased, this means the total number of pupils also increased.
So the total number of boys who are right-handed as a percentage of the total number of pupils will decrease.