A bag contains 4 red and some black balls, Aball is picked from the ba

1.	A bag contains 4 red and some black balls, Aball is picked from the bag at random. If theprobability of it being a black ball is twice thatof a red ball, then the number of black balls inthat bag is
Answer» ANSWER: NUMBER of red balls = 4 Probability (black ball) = 2 × Probability (red ball) Step-by-step EXPLANATION: Probability = Favorable outcomes/Total outcomes Calculation: LET the number of black balls be ‘x’ According to the question, x/(4 + x) = 2 × 4/(4 + x) ⇒ x = 8 ∴ Number of black balls = 8 HOPE IT HELPS!!!!! Thankyou!!! All the Best!!!!!

A bag contains 4 red and some black balls, Aball is picked from the bag at random. If theprobability of it being a black ball is twice thatof a red ball, then the number of black balls inthat bag is

Answer»

ANSWER:

NUMBER of red balls = 4

Probability (black ball) = 2 × Probability (red ball)

Step-by-step EXPLANATION:

Probability = Favorable outcomes/Total outcomes

Calculation:

LET the number of black balls be ‘x’

According to the question,

x/(4 + x) = 2 × 4/(4 + x)

⇒ x = 8

∴ Number of black balls = 8

HOPE IT HELPS!!!!!

Thankyou!!! All the Best!!!!!

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A bag contains 4 red and some black balls, Aball is picked from the bag at random. If theprobability of it being a black ball is twice thatof a red ball, then the number of black balls inthat bag is​

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A bag contains 4 red and some black balls, Aball is picked from the bag at random. If theprobability of it being a black ball is twice thatof a red ball, then the number of black balls inthat bag is