All SAT II Math I Resources
Example Questions
Example Question #11 : Probability
If you draw an ace from and deck then place it back in the deck, what is the probability of drawing another ace?
Since the first card was placed back into the deck, it will have no effect on the second draw.
Since there are aces in a deck of cards, the probability would be
or .
Example Question #11 : Probability
A fair 6 sided die is rolled twice. What is the probability of observing a 6 both times?
The probability of rolling a 6 once is because 6 is one of 6 different possible outcomes.
The probability of two independent events happening can be multiplied together. The probability of getting 2 6's is:
Example Question #812 : Sat Subject Test In Math I
If an integer is randomly selected such that , what is the probability that is a prime number?
Probability is defined as specified outcomes divided by total possible outcomes.
Recall that a prime numbered is defined as a number that is divisible only by one and itself, and is not prime. There are prime numbers in the range of possible values:
Notice that the range of values, includes zero , so there are total numbers to select from.
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