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प्रश्न
A bag contains 4 red, 5 black and 6 white balls. A ball is drawn from the bag at random. Find the probability that the ball drawn is:
not black
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उत्तर
\[\text{ Number of red balls }= 4\]
\[\text{ Number of black balls } = 5\]
\[\text{ Number of white balls } = 6\]
\[\text{ Total number of balls in the bag } = 4 + 5 + 6 = 15\]
\[\text{ Therefore, the total number of cases is 15 }. \]
\[\text{ Let C denote the event of getting a black ball }. \]
\[\text{ Number of favourable outcomes .e number of black balls }=5\]
\[P\left( C \right) = \frac{\text{ Number of favourable outcomes }}{\text{ Total number of outcomes }} = \frac{5}{15} = \frac{1}{3}\]
\[\text{ Therefore, the probabilty of not getting a black ball is as follows }: \]
\[P\left( \bar{C} \right) = 1 - P\left( C \right) = 1 - \frac{1}{3} = \frac{2}{3}\]
संबंधित प्रश्न
Numbers 1 to 10 are written on ten separate slips (one number on one slip), kept in a box and mixed well. One slip is chosen from the box without looking into it. What is the probability of.
- Getting a number 6?
- Getting a number less than 6?
- Getting a number greater than 6?
- Getting a 1-digit number?
In a simultaneous throw of a pair of dice, find the probability of getting:
a doublet of prime number
In a simultaneous throw of a pair of dice, find the probability of getting:
neither 9 nor 11 as the sum of the numbers on the faces
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either a black card or a king
A bag contains 3 red balls, 5 black balls and 4 white balls. A ball is drawn at random from the bag. What is the probability that the ball drawn is:
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red or white
If you put 21 consonants and 5 vowels in a bag. What would carry greater probability? Getting a consonant or a vowel? Find each probability.
If you have a collection of 6 pairs of white socks and 3 pairs of black socks. What is the probability that a pair you pick without looking is
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When two dice are rolled:
List the outcomes for the event that the total is odd.
The probability of an event which is impossible to happen is ______.
