Question

3. A bag contains 5 red balls and some blue balls. If the probability of drawing a blue ball
is double that ofa red ball, determine the number of blue balls in the bag. with full solution​

Answer 1

Step-by-step explanation:

number of red balls=5

probability of red ball is equal to X

probability of blue ball is 2x

probability of red ball =2×5 is 10

the sum of the probability is always 1

probability of blue ball + probability of red ball=1

5 + 10=15=1

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Answer 2

Answer:

HEY MATE HERE IS YOUR ANSWER

Step-by-step explanation:

LET THE NUMBER OF  BLUE BALLS BE X

WE KNOW THAT THERE ARE 5RED BALLS

HENCE THE TOOTAL NUMBER OF BALL IN THE BAG IS=X+5

P(OF GETTING A RED BALL)=5/X+5

PROBABILITY OF GETTING A BLUE BALL IS=X/X+5

WE ARE GIVEN THAT

2[5/X+5]=X/X+5

10[X+5]=X^2+5X

x^2-5X-50=0

X^2-10X+5X-50=0

X(X-1)+5(X-10)=0

(X-10)(X-5)=0

NOW YOU CAN TELL THAT

X=10 OR X=-5

NOW NUMBER OF BALS CANT BE NEGATIVE SO NUMBER OF BLUE BALLS IS 10

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