How many wear glasses?
A school has 300 students. 40% of them are boys. 25% of the boys wear glasses. 30% of the girls wear glasses.
How many students in total wear glasses?
A box of biscuits
A box of biscuits contains 36 biscuits. 20 biscuits have foil wrappers. 15 are chocolate biscuits with foil wrappers. If 9 are not chocolate and do not have a foil wrapper, then how many chocolate biscuits are there?
Step 1: Find the number of boys:
ReplyDelete40% of 300 = (40 ÷ 100) × 300 = 120 boys
Step 2: Find the number of girls:
300 - 120 = 180 girls
Step 3: Find how many boys wear glasses:
25% of 120 = (25 ÷ 100) × 120 = 30 boys wear glasses
Step 4: Find how many girls wear glasses:
30% of 180 = (30 ÷ 100) × 180 = 54 girls wear glasses
Step 5: Find the total number of students who wear glasses:
30 boys + 54 girls = 84 students
Final Answer:
84 students in total wear glasses.