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2 votes
1 answer
1322
A man visits a couple who have 2 children. one of the children, a boy, comes into the room.
A man visits a couple who have 2 children. one of the children, a boy, comes into the room. find the probability p that the other is also a boy. (a)1/3 (b)2/3 (c)1/2 (d)3/4
A man visits a couple who have 2 children. one of the children, a boy, comes into the room. find the probability p that the other is also a boy.(a)1/3(b)2/3(c)1/2(d)3/4
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14 votes
5 answers
1323
GATE CSE 1995 | Question: 1.18
The probability that a number selected at random between $100$ and $999$ (both inclusive) will not contain the digit $7$ is: $\dfrac{16}{25}$ $\left(\dfrac{9}{10}\right)^{3}$ $\dfrac{27}{75}$ $\dfrac{18}{25}$
The probability that a number selected at random between $100$ and $999$ (both inclusive) will not contain the digit $7$ is: $\dfrac{16}{25}$$\left(\dfrac{9}{10}\right)^...
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39 votes
4 answers
1324
GATE CSE 2001 | Question: 2.4
Seven (distinct) car accidents occurred in a week. What is the probability that they all occurred on the same day? $\dfrac{1}{7^7}\\$ $\dfrac{1}{7^6}\\$ $\dfrac{1}{2^7}\\$ $\dfrac{7}{2^7}\\$
Seven (distinct) car accidents occurred in a week. What is the probability that they all occurred on the same day?$\dfrac{1}{7^7}\\$$\dfrac{1}{7^6}\\$$\dfrac{1}{2^7}\\$$\...
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7 votes
2 answers
1328
random variable $X^2+Y^2 >1$
Consider two independent random variables $X$ and $Y$ having probability density functions uniform in the interval $[-1, 1]$. The probability that $X^{2}+Y^{2}>1$ is $\pi/4$ $1-\pi/4$ $\pi/2 - 1$ Probability that $X^{2}+Y^{2}<0.5$ None of the above.
Consider two independent random variables $X$ and $Y$ having probability density functions uniform in the interval $[-1, 1]$. The probability that $X^{2}+Y^{2}>1$ is $\pi...
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