Question

A box contains 10 red marbles, 13 blue marbles, 6 green marbles and 7 white
marbles. What is the probability of selecting a red marble?

Answer 1

Answer:

Total number of marbles = 10+20+30 = 60 out of which 20 are blue.

Probability of first marble being blue = 20/60

Probability of second marble being blue = 19/59

Probability of third marble being blue = 18/58

Probability of fourth marble being blue = 17/57

Probability of fifth marble being blue = 16/56

So probability of all marble being blue when five marbles are drawn from the box = (20/60)*(19/59)*(18/58)*(17/57)*(16/56) = 34/11977 = 0.00283877432

Step-by-step explanation:

Answer 2

ANSWER: 10/36 or simplified to 5/18

explanation:

step 1: add all of the marbles together, you should get 36 marbles

step 2: now take your 36 and your 10 red marbles and convert that into a fraction, you should get 10/36

step 3: [only do this step of you need to simplify your fraction!] find a common denominator (a number that can be divided by both numbers in the fraction) and divide both numbers by the common denominator until you no longer can. 10 and 36 are both divideable by 2. After dividing, you should get 5/18. since 5 and 18 don't have any common denominators, you're done simplifying!