Question

the ratio of the number of the people in colony A to the number of the colony B is 3:2 . if the colony A had 30 people at first , how many people must be tramsferred from colony A to colony B, so that the ratio will become 3:7 ?
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Answer 1

Answer:

50 people

Step-by-step explanation:

No. of people in the colony A= 30 people

The number from colony A to B=3:2

No. of people in the colony B=  3:2=3*10:2*10=30/20

Therefore, no. of people must be transferred from colony A to colony B, so that the ratio will become 3:7

Now, the people should be there in colony A=30 people

Now, the people should be there in the colony B= 70 people

So, no. of people should be transferred to colony B= 70-20

                                                                                      =50