If you convert 1/4 into 5/20 then 13/20 + 5/20 = 18/20
If he put 10 in the bowl and there are 150 cards, the chance for him to win would be 10/150.
now by simplifying it, you get 1/15.
therefore answer is C
I got answer 94. You have to add up given degrees and subtract from 180°.
257 is a whole number, interger, and a rational number.