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A retail store sent out a promotional offer to 300 former customers an

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A retail store sent out a promotional offer to 300 former customers an  [#permalink]

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New post 20 Apr 2018, 06:31
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Question Stats:

96% (00:45) correct 4% (00:29) wrong based on 30 sessions

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A retail store sent out a promotional offer to 300 former customers and 700 potential customers. What percent of the total number of people who received the promotional offer gave a favorable response?

(1) The store received a favorable response from 30 percent of the former customers.
(2) The store received a favorable response from 20 percent of the potential customers.

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Re: A retail store sent out a promotional offer to 300 former customers an  [#permalink]

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New post 20 Apr 2018, 06:49
Bunuel wrote:
A retail store sent out a promotional offer to 300 former customers and 700 potential customers. What percent of the total number of people who received the promotional offer gave a favorable response?

(1) The store received a favorable response from 30 percent of the former customers.
(2) The store received a favorable response from 20 percent of the potential customers.


To know the percent who gave a favorable response from all customers we need to know the number or percent for each of the groups.
We'll look for statements that give us this information, a Logical approach.

(1), (2) Both give us the percent in only one of the groups.
Insufficient.

Combined:
We now have enough information to calculate (the calculation is (0.3*300 + 0.2*200)/1000, but we don't actually care what this number is!)
Sufficient.

(C) is our answer.
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Re: A retail store sent out a promotional offer to 300 former customers an &nbs [#permalink] 20 Apr 2018, 06:49
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