In a jar there are balls in different colors: blue, red, green and yellow.
The probability of drawing a blue ball is 1/8.
The probability of drawing a red ball is 1/5.
The probability of drawing a green ball is 3/10.
If a jar cannot contain more than 50 balls, how many yellow balls are in the Jar?
Choose one.
A) 20  B) 25  C) 15  D) 30  E) 35
answer of 1st   just add the given probabilities p(blue)+p(red)+p(green) i.e   1/8+1/5+3/10=5+8+12/40 =25/40   now we know p(blue)+p(red)+p(green)+p(yellow)=1   25/40+p(yellow)=1   p(yellow)=15/40   i.e why yellow balls are 15.   15
<result>C</result>
In a jar there are balls in different colors: blue, red, green and yellow.
The probability of drawing a blue ball is 1/8.
The probability of drawing a red ball is 1/5.
The probability of drawing a green ball is 3/10.
If a jar cannot contain more than 50 balls, how many yellow balls are in the Jar?