A bag contains 20 marbles. 5 are blue and the rest are red. What is the probability of randomly choosing a red marble?

A bag contains 20 marbles. 5 are blue and the rest are red.

=> The number of red marbles in the bag: 20 - 5 = 15

=> The probability of randomly choosing a red marble: P = 15/20 = 0.75

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question is incomplete.

25 questions , because they start with 100.  

350-100=250 .  

. 250/10=25

step-by-step explanation:

first take off 100, then what x 10 = 250? that is your answer. (25)