A birthday child reaches into a bag filled with toys (1 yo-yo, 1 ball, 1 whistle, and 1 box crayons). If the child randomly picks three toys, what is the probability the child will pick the yo-yo and a ball as two of the three toys? Choose the correct choice from the following answers
A) 1/3
B) 1/2
C) 1/4
D) 1/5
E) 2/5
Combination Formula: nCr = n!/(r!(n - r)!), where n is the population/set, and r is the sample/subset.   Total number possible = 4C3 - 4!/(3!(4 - 3)!) = 4   Number yo-yo possible = 1C1 = 1   Number ball possible = 1C1 = 1   Number other possible = 2C1 = 2   Probability Formula: P(A) = (Number Favorable Outcomes)/(Total Number Possible Outcomes)   P(Y1/2) = (1C1)(1C1)(2C1)/4C3 = 2/4 = 1/2   Answer: 1/2
<result>B</result>
A birthday child reaches into a bag filled with toys (1 yo-yo, 1 ball, 1 whistle, and 1 box crayons). If the child randomly picks three toys, what is the probability the child will pick the yo-yo and a ball as two of the three toys?