The ratio of the number of red beads to the number of green beads to the number of blue beads is 2 : 3 : 7. There are 150 more b
1 answer:
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Step-by-step explanation:
n (U)=2000
n (A)=50% of 2000
=(50÷100)×2000
= 1000
n( B) = 40%
= (40÷100)×2000
= 800
n(AuB)(compliment) = 15%
=(15÷100)×2000
=300
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