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answer is 400
Let the requiere no. be x.
15% of 30% of x=18
(15/100)×(30/100)×x= 18
(450/10000)*x=18
x=10000×18/450
x=400
Hence, requiere no. is 400
Let the requiere no. be x.
15% of 30% of x=18
(15/100)×(30/100)×x= 18
(450/10000)*x=18
x=10000×18/450
x=400
Hence, requiere no. is 400
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