Q&A - Ask Doubts and Get Answers

Sort by :
Clear All
Q

Three unbiased coins are tossed. What is the probability of getting at most two heads?

  • Option 1)

    \frac{3}{4}

  • Option 2)

    \frac{3}{5}

  • Option 3)

    \frac{3}{8}

  • Option 4)

    \frac{7}{8}

  • Option 5)

    \frac{1}{4}

What is the probability of getting a sum 9 from two throws of a dice?

  • Option 1)

    \frac{1}{6}

  • Option 2)

    \frac{2}{5}

  • Option 3)

    \frac{1}{9}

  • Option 4)

    \frac{1}{12}

  • Option 5)

    \frac{1}{8}

In a box, there are 8 red, 7 blue and 6 green balls. One ball is picked up randomly. What is the probability that it is neither red nor green?

  • Option 1)

    \frac{1}{3}

  • Option 2)

    \frac{3}{4}

  • Option 3)

    \frac{7}{19}

  • Option 4)

    \frac{3}{18}

  • Option 5)

    \frac{8}{21}

A bag contains 2 red, 3 green and 2 blue balls. Two balls are drawn at random. What is the probability that none of the balls drawn is blue?

  • Option 1)

    \frac{10}{21}

  • Option 2)

    \frac{11}{21}

  • Option 3)

    \frac{12}{21}

  • Option 4)

    \frac{5}{7}

  • Option 5)

    \frac{2}{7}

Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. What is the probability that the ticket drawn has a number which is a multiple of 3 or 5?

  • Option 1)

    \frac{1}{2}

  • Option 2)

    \frac{2}{5}

  • Option 3)

    \frac{3}{7}

  • Option 4)

    \frac{9}{20}

  • Option 5)

    \frac{8}{15}

Four dice are thrown simultaneously. Find the probability that all of them show the same face.

  • Option 1)

    \frac{1}{216}

  • Option 2)

    \frac{1}{36}

  • Option 3)

    \frac{1}{172}

  • Option 4)

    \frac{3}{216}

  • Option 5)

    \frac{4}{216}

An urn contains 6 red, 5 blue and 2 green marbles. If 2 marbles are picked at random, what is the probability that both are red?

  • Option 1)

    \frac{4}{27}

  • Option 2)

    \frac{5}{26}

  • Option 3)

    \frac{5}{13}

  • Option 4)

    \frac{7}{26}

  • Option 5)

    \frac{6}{13}

The chance of throwing 3 or 5 or 11 with two dice is

  • Option 1)

    \frac{5}{36}

  • Option 2)

    \frac{1}{9}

  • Option 3)

    \frac{2}{9}

  • Option 4)

    \frac{2}{7}

  • Option 5)

    None

What is the probability of a leap year to have 53 Fridays?

  • Option 1)

    \frac{1}{5}

  • Option 2)

    \frac{2}{7}

  • Option 3)

    \frac{1}{2}

  • Option 4)

    None

  • Option 5)

    \frac{1}{7}

What is the probability of a ordinary year to have 53 Mondays?

  • Option 1)

    \frac{1}{7}

  • Option 2)

    \frac{1}{5}

  • Option 3)

    \frac{1}{2}

  • Option 4)

    None

  • Option 5)

    \frac{2}{7}

Exams
Articles
Questions