In a bag of blue and yellow marbles, the ratio of blue marbles to yellow marbles is 3: 5. if the bag contains 60 yellow marbles, how many blue marbles are there?
a) 12
b) 24
c) 36
d) 48

What is the probability of throwing several dice with sum equal to 6 (six)? show the ways of possibilities for sum 6 (as the numerator) and the ways of throwing n dices for n = 1, 2, 3, 4 or 5 as denominator for all the questions to earn full credits. (a)throw one die, (b) throw two dice, (c) throw three dice (d) throw 4 dice, (e) throw 5 dice