Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. what is the probability that the ticket drawn has a number which is a multiple of 3 or 5?

Created: 6 years ago | Updated: 3 years ago

1/2

2/5

8/15

9/20

None of them

Pubali Bank Ltd Pubali Bank Ltd - Junior Officer (Cash) - 17.05.2013 গণিত সম্ভাব্যতা (Probability)

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0 291

best des

S =  [1,2,3,4,  -  -  -  -  -  - 19,20]
ধরি, E = event of 3 অথবা 5 এর multiple পাবার সম্ভাব্যতা  = [3,6,9,12,15,18,5,10,20]
⸫ P(E) = n(E)/n(S) =  9/20

6 years ago

0 0

Md Azizur Rahman

Founder of Satt

সম্ভাব্যতা (Probability)

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Created: 6 years ago | Updated: 9 months ago

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Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. what is the probability that the ticket drawn has a number which is a multiple of 3 or 5?

সম্ভাব্যতা (Probability)

Related Question

1. ২০ সদস্যবিশিষ্ট একটি ফুটবল দল থেকে একজন অধিনায়ক ও একজন সহ-অধিনায়ক কতভাগে নির্বাচন করা যাবে?

3. A Zoo keeper counted the heads of the animals in a zoo and found it to be 80. When he counted the legs of the animals he found it to be 260. If the zoo had either pigeons or horses, how many horses were there in the zoo ?

4. In a box , there are 8 red, 7 blue and 6 green balls. One ball is picked up randomly. What is the probability that it is neither red nor green ?

5.
A fair coin is thrown in the air four times. If the coin lands with the head up on the first three tosses, what is the probability that the coin will land with the head up on the fourth toss ?

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Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. what is the probability that the ticket drawn has a number which is a multiple of 3 or 5?

সম্ভাব্যতা (Probability)

Related Question

1. ২০ সদস্যবিশিষ্ট একটি ফুটবল দল থেকে একজন অধিনায়ক ও একজন সহ-অধিনায়ক কতভাগে নির্বাচন করা যাবে?

3. A Zoo keeper counted the heads of the animals in a zoo and found it to be 80. When he counted the legs of the animals he found it to be 260. If the zoo had either pigeons or horses, how many horses were there in the zoo ?

4. In a box , there are 8 red, 7 blue and 6 green balls. One ball is picked up randomly. What is the probability that it is neither red nor green ?

5. A fair coin is thrown in the air four times. If the coin lands with the head up on the first three tosses, what is the probability that the coin will land with the head up on the fourth toss ?

Pubali Bank Ltd

Promotion

Download Our Mobile Apps

Satt policy

Main Features

Subscribe our newsletter

5.
A fair coin is thrown in the air four times. If the coin lands with the head up on the first three tosses, what is the probability that the coin will land with the head up on the fourth toss ?