A bag contains 5 yellow balls 4 blue balls and 3 black balls ,a ball is drawn from the bag without looking. what is the probability of getting a blue ball?
Answers
Answer:
19/22
Step-by-step explanation:
A bag has 5 blue balls, 4 yellow balls, and 3 green balls. You draw 3 balls. What is the probability of getting 2 balls of the same colour?
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Balls are Blue=5, Yellow =4, Green=3, Total=12.
Total probability of getting 3 balls=12C3
For 2 ball of blue colour out of 5 balls=5C2
the remaining 1 ball may be of any colour because remaining balls are 12-2=10 so
probability for 1 ball=10C1
so total probability for
2 blue and 1 of any colour=5C2*10C1 for 2 yellow and 1 of any colour =4C2*10C1
for 2 green and 1 of any colour=3C2*10C1 hence for complete set
P=[5C2*10C1+4C2*10C1+3C2*10C1]/12C3
=[5C2+4C2+3C2]*10C1/12C3
=(10+6+3)*10/220
=190/220
=19/22
Answer:
19/22 is the probability of getting a blue ball