ways of obtaining a three digit number 9*10*10 = 900ways
ways of obtaining a three digit number WITHOUT 7 is 8*9*9 = 648 ways

1- (648/900) = 252/900 = 7/25

The lowest coordinate point for x can be (-4, 6). Go horizontally [from -4] to select a point and vertically [from -4] to select another point. Since you have already chosen -4 as x-coordinate, you have horizontally 9 points [from -3 to + 5 inclusive, i.e., 9 points]. Similarly, since you have chose...

qamar999 wrote:2^(4-1)^2/2^3-2

1. 2^8
2. 2^7
3. 2^6
4. 2^5
5. 2^4

yeah that's how it is. just messed up the answer options. they're fine now. any idea?[/img]

received a pm. The passage was fairly straightforward but there are some very tempting wrong answers in these two questions. Question 1: The correct answer must be choice A. If we have two trees that are from the same area, then of course the climate would have been the same in any given year. (It ...

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Basically it can land head or tail, it asks the prob of landing equally in the 3 attempts, hence it can be 3 times haed or tail

1/8 + 1/8 = 1/4

multiples of 2 less than 20: 2,4,6,8,10,12,14,16,18 (total: 9)
odd multiple of 7: 7 (total:1)
sum of a positive multiple of 2 and a positive multiple of 7: (2+7,4+7,6+7,8+7,9+7, 14+2, 14+4. total:7)

9+1+7=17

OA?