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Probability of Union of Two Events

Quiz by Joshua Aquino

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10 questions
Show answers
  • Q1

    It is the branch of Mathematics concerning numerical descriptions of how likely an event is to occur, or how likely it is that a proposition is true.

    Events

    Union

    Probability

    Intersection

    300s
  • Q2

    What is the formula for getting a probability of an event.

    P(E)=n(E)/n(S)

    P(A or B)=P(A)+P(B)

    P(A or B)=P(A)+P(B)-P(A and B)

    a2+b2=c2

    300s
  • Q3

    From a deck of 52 cards, what is the probability of drawing a number card or a queen?

    12/13 or 0.92

    11/13 or 0.84

    1

    41/52 or .79

    300s
  • Q4

    Fifteen balls in a jar numbered from 1 to 15. A ball is drawn at random. What is the probability that the number on the ball is less than 6 or even?

    2/15

    7/3

    11/15

    2/3

    300s
  • Q5

    In a class of 30 students, 15 students like science and 21 like math. They all like at least 1 of the two subjects. What is the probability that a student is chosen in random likes math or science?

    21/30

    1/15

    1/5

    1

    300s
  • Q6

    From a deck of 52 cards, what is the probability of drawing an ace or a black card?

    15/26

    1/2

    1/13

    7/13

    300s
  • Q7

    From a box containing 20 balls, 7 balls are color red, 8 balls are blue, and 5 balls are yellow. What is the probability that a ball is drawn in random  will be color red or yellow?

    3/5

    7/15

    3/2

    1/2

    300s
  • Q8

    If the union of A or B is all numbers in the first 40 positive integers, find the intersection if the elements of A are the numbers divisible by 2 and B are the numbers divisible by 5? 

    (A and B)={2,20,3,30}

    (A and B)= {5,10,20,25,30,35,40}

    (A and B)={10,15,20,25,30,35,40}

    (A and B)={10,20,30,40}

    300s
  • Q9

    If the sample space is 40, A=25 and B=27. Find the probability of the union A or B?

    1/2

    1

    3/4

    1/4

    300s
  • Q10

    __________ is the collection of all possible outcomes.

    Intersection

    Event

    Probability

    Sample Space

    300s

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