Answer:
if union, U means plus,+
if intersect means minus, -
Step-by-step explanation:
iknow but its hard to expalin
Answer:
4000
Step-by-step explanation:
5000 * .8 is 4000
Answer: 15 boys
Explanation: ratio 5:7
5 + 7 = 12
Number of boys = 5/12 × 36