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by rina777
Replies
4
Views
8,122

### A.P(both will decode the message)=0.70 * 0.80 =...

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...

by rina777
Replies
6
Views
993

### Here we have to use combination formula because...

Here we have to use combination formula because here order is not considerable.

by rina777
Replies
6
Views
1,887

by rina777
Replies
5
Views
938

### Let the asking price is x, after reducing the...

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...
5. ## Thread: Powerprep questions,,,,much easier

by rina777
Replies
12
Views
1,923

### @ premprakash, for #2 didn't you miss the...

@ premprakash, for #2 didn't you miss the negative integer -1 to -12 and 0 is also an integer. so the total is 25.

by rina777
Replies
7
Views
1,966

### For Question#1 I got 3 too.

For Question#1 I got 3 too.
7. ## Thread: Powerprep questions,,,,much easier

by rina777
Replies
12
Views
1,923

### Hi tractable, I don't know what to say. I think...

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.

by rina777
Replies
13
Views
2,129

### Is 0 is a positive integer? I think it is neutral...

Is 0 is a positive integer? I think it is neutral ie neither positive nor negative.....
9. ## Thread: Powerprep questions,,,,much easier

by rina777
Replies
12
Views
1,923

### wish you very good luck tractable!!!!!!:tup:

wish you very good luck tractable!!!!!!:tup:
10. ## Thread: Math Question - Subtracting or Adding Exponents with same base

by rina777
Replies
3
Views
6,654

### (2^30-2^29)/2 = 2^28(4-2)/2 = 2^28 so A=B and the...

(2^30-2^29)/2 = 2^28(4-2)/2 = 2^28 so A=B and the answer is C
11. ## Thread: Some good word problems

by rina777
Replies
6
Views
2,241

### 3. the answer is D 31%.

3. the answer is D 31%.

by rina777
Replies
6
Views
2,241

by rina777
Replies
6
Views
2,241

1.100y
14. ## Thread: Three GRE questions

by rina777
Replies
11
Views
3,947

### 2. Least Common factor of 225 and 216 is...

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