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8 coins are tossed simultaneously. The probability of getting at least 6 heads is

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Important Questions on Probability

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Gamma Question Bank for Engineering Mathematics>Chapter 21 - Probability>Assignment>Q 21
In binomial probability distribution, mean is 3 and standard deviation is 32. Then the value of p is
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Gamma Question Bank for Engineering Mathematics>Chapter 21 - Probability>Assignment>Q 22
The probability of a bomb hitting a bridge is 12 and two direct hits are needed to destroy it. The least number of bombs required so that the probability of the bridge being destroyed is greater than 0.9 , is
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Gamma Question Bank for Engineering Mathematics>Chapter 21 - Probability>Assignment>Q 23
In a simultaneous toss of four coins, the probability of getting exactly three heads is 
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Gamma Question Bank for Engineering Mathematics>Chapter 21 - Probability>Assignment>Q 24
A die is tossed twice. Getting a number greater than 4 is considered a success. Then the variance of the distribution of the number of successes is
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Gamma Question Bank for Engineering Mathematics>Chapter 21 - Probability>Assignment>Q 25
 A biased coin with probability p, 0<p<1, of heads is tossed until a head appears for the first time. If the probability that the number of tosses required is even is 25, then p is equal to
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Gamma Question Bank for Engineering Mathematics>Chapter 21 - Probability>Assignment>Q 26
If two coins are tossed 5 times, then the probability of getting 5 heads and 5 tails is
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Gamma Question Bank for Engineering Mathematics>Chapter 21 - Probability>Assignment>Q 27
A die is thrown 100 times. Getting an even number is considered a success. The variance of the number of successes is
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Gamma Question Bank for Engineering Mathematics>Chapter 21 - Probability>Assignment>Q 28
A contest consists of predicting the results as win, draw or defeat of 7 football matches. A person sent his entry by predicting at random. The probability that his entry will contain exactly 4 correct predictions is