a box contains 20 electric bulbs , out of which 4 are defective . 2 bulbs are chosen at random from this box . The probability that at least one of these is defective is

Created: 5 years ago | Updated: 3 years ago

7/19

6/19

5/19

3/19

Sonali Bank Ltd Sonali bank Ltd : officer ( cash) -27.04.2018 গণিত সম্ভাব্যতা (Probability)

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Non defective electric bulb এর সংখ্যা = 16C₂ /20C₂ = 120/190 = 12/19

কমপক্ষে 1 টি defective bulb পাবার সম্ভাব্যতা = 1 - 12/19 = 19 - 12/19 = 7/19

5 years ago

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Md Azizur Rahman

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সম্ভাব্যতা (Probability)

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a box contains 20 electric bulbs , out of which 4 are defective . 2 bulbs are chosen at random from this box . The probability that at least one of these is defective is

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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a box contains 20 electric bulbs , out of which 4 are defective . 2 bulbs are chosen at random from this box . The probability that at least one of these is defective is

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 ?

Sonali Bank Ltd

Promotion

Download Our Mobile Apps

Satt policy

Main Features

Subscribe our newsletter

Promotion

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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 ?