The probability of rolling any number of an wighted 6-sided die, with faces numbered 1 through 6, is directly proportional to the number rolled. What is the probability of getting 5, if the die is rolled only once?

Created: 6 years ago | Updated: 3 years ago

1/6

5/6

5/16

5/21

None of these

United Commercial Bank Ltd (UCB) United Commercial Bank Ltd - Probationary Officer - 17.02.2017 গণিত সম্ভাব্যতা (Probability)

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If the probability of rolling a particular number is related to that number, then in 21( =  1   +   2   +   3   +   4   +   5   +   6) rollls, we'll have the following roll a '1' once, a '2' twice, a '3' thrice etc.
Then th probability of those number is 
p(1)  =  1/21
p(2)  =  2/21
p(3)  =  3/21
p(4)  =  4/21
p(5)  =  5/21
p(6)  =  6/21
 $∴$  The probability of getting 5, if the die is rolled only once is  $\frac{5}{21}$

6 years ago

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Md Azizur Rahman

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The probability of rolling any number of an wighted 6-sided die, with faces numbered 1 through 6, is directly proportional to the number rolled. What is the probability of getting 5, if the die is rolled only once?

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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 ?

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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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The probability of rolling any number of an wighted 6-sided die, with faces numbered 1 through 6, is directly proportional to the number rolled. What is the probability of getting 5, if the die is rolled only once?

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 ?

United Commercial Bank Ltd (UCB)

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Download Our Mobile Apps

Satt policy

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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 ?