Complementary Events
Interactive practice questions
Determine which of the following pairs of events are complementary.
Event A: Selecting a positive number.
Event B: Selecting a negative number.
Complementary
Not complementary
Event A: Drawing a red card from a standard deck of cards (no jokers).
Event B: Drawing a black card from a standard deck of cards (no jokers).
Complementary
Not complementary
Event A: Drawing a club from a standard deck of cards (no jokers).
Event B: Drawing a spade from a standard deck of cards (no jokers).
Complementary
Not complementary
Event A: Rolling a number greater than $3$3 on a die.
Event B: Rolling a number less than $3$3 on a die.
Complementary
Not complementary
The probability that a certain event will occur is $\frac{2}{9}$29.
Determine the probability that the complementary event will occur.
The probability of an event is $0.64$0.64. What is the probability of the complementary event?
A biased coin is flipped, with heads and tails as possible outcomes. Calculate $P\left(\text{heads}\right)$P(heads) if $P\left(\text{tails}\right)$P(tails) is $0.64$0.64.