A box contain 7 blue marbles, 9yellow marbles and 5black marbles. One marble is taken out of the box at random. What is the probability that the marble taken out will be (a) blue? (b) yellow? (c) Not black?
Answers
Required Answer :
- Probability (Blue marbles) = 1/3
- Probability (Yellow marbles) = 3/7
- Probability (Not back) = 16/21
Given :
• A box contains some marbles :
- Blue marbles = 7
- Yellow marbles = 9
- Black marbles = 5
To find :
• Probability that the marble taken out is :
- (a) Blue
- (b) Yellow
- (c) Not black
Solution :
⇒ Total outcomes = 7 + 9 + 5
⇒ Total outcomes = 21
Probability that the marble taken out is blue :
⇒ Possible outcomes (Blue marbles) = 7
⇒ Probability (Blue marbles) = Possible outcomes ÷ Total outcomes
⇒ Probability (Blue marbles) = 7/21
⇒ Probability (Blue marbles) = 1/3
Probability that the marble taken out is yellow :
⇒ Possible outcomes = 9
⇒ Probability (Yellow marbles) = Possible outcomes ÷ Total outcomes
⇒ Probability (Yellow marbles) = 9/21
⇒ Probability (Yellow marbles) = 3/7
Probability that the marble taken out is not black :
⇒ Possible outcomes = 7 + 9
⇒ Possible outcomes = 16
⇒ Probability (Not back) = Possible outcomes ÷ Total outcomes
⇒ Probability (Not back) = 16/21
Answer:
yellow marbles
Step-by-step explanation:
Randomly I can say yellow marbles