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rina777

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  1. A.P(both will decode the message)=0.70 * 0.80 = 0.56 B.P(at least one of them will decode the message)= 1- P(none of them will decode the message)= 1-(1-.70)(1-.80)=0.94 C.P(neither of them will decode the message)=(1-.70)(1-.80)=.06
  2. Here we have to use combination formula because here order is not considerable.
  3. Let the asking price is x, after reducing the asking price 10% it becomes .9x. here, .9x=1953 so x=2170, which would make 40% profit. so cost price is (100*2170)/140=1550 , which makes (1953-1550)=$403 profit
  4. @ premprakash, for #2 didn't you miss the negative integer -1 to -12 and 0 is also an integer. so the total is 25.
  5. For Question#1 I got 3 too.
  6. Hi tractable, I don't know what to say. I think if you could manage a good night sleep before test night, surely you could manage your expected score. wish you all the best.
  7. Is 0 is a positive integer? I think it is neutral ie neither positive nor negative.....
  8. wish you very good luck tractable!!!!!!:tup:
  9. (2^30-2^29)/2 = 2^28(4-2)/2 = 2^28 so A=B and the answer is C
  10. 3. the answer is D 31%.
  11. 2. Least Common factor of 225 and 216 is 2^3*3^3*5^2 so the least possible value of a+b+c would be 3+3+2=8
  12. rina777

    gre math

    2. the answer is D
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