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Probability

Problems

Simple Probability

Complementary Events and Odds

Problem : If a dice is rolled once, what is the probability that it will show an even number? An odd number?

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Problem : If a dice is rolled once, what is the probability that it will show a prime number ( 1 is not prime)?

Problem : If a dice is rolled once, what is the probability that it will show a multiple of 3 ?

Problem : If a dice is rolled once, what is the probability that it will show a multiple of 1 ? A multiple of 7 ?

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Problem : If a coin is flipped twice, what is the probability that it will land heads once and tails once?

Problem : If a coin is flipped twice, what is the probability that it will land heads at least once?

Problem : A bag contains 4 white counters, 6 black counters, and 1 green counter. What is the probability of drawing:
a) A white counter?
b) A black counter?
c) A green counter?
d) A white counter or a black counter?
e) A white counter or a green counter?

a)
b)
c)
d)
e)

Problem : A deck of cards contains 52 cards, 13 from each suit. If a card is flipped over, what is the probability that it is a spade? That it is a face card (J, Q, K) of any suit?

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