Homework Help

A box has 150 balls of which 65 are red and 30 blue. What is the probability that a...

user profile pic

torrip996 | Student, Grade 10 | (Level 1) Salutatorian

Posted March 10, 2011 at 11:45 AM via web

dislike 1 like

A box has 150 balls of which 65 are red and 30 blue. What is the probability that a ball picked up at random is red or blue?

2 Answers | Add Yours

user profile pic

justaguide | College Teacher | (Level 2) Distinguished Educator

Posted March 10, 2011 at 11:59 AM (Answer #1)

dislike 1 like

The box has 150 balls. Of these 65 balls are red in color and 30 are blue. We pick up one ball at random and want to know the probability that the ball is either red or blue. There are a total of 65 + 30 = 95 balls which satisfy the given condition.

Therefore the probability that a ball picked up at random is red or blue is 95/150 = 19/30.

The required probability is 19/30

user profile pic

jbrenw | Student, Grade 9 | (Level 1) Honors

Posted September 29, 2011 at 3:22 AM (Answer #2)

dislike 0 like

19/30

Join to answer this question

Join a community of thousands of dedicated teachers and students.

Join eNotes