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What is the mean variance and standard deviation for the number of heads when 20 coins are tossed?
Wiki User
∙ 15y ago
mean = np = 20*0.5 = 10 Variance = npq = 20*0.5*0.5 = 5 Std dev = sqrt(npq) = sqrt(20*0.5*0.5) = 2.23
Wiki User
∙ 15y ago
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A fair coin is tossed 10 times what are the expected mean and variance of the number of heads?
mean = 5, variance = 5
A number cube labeled 1-6 was tossed. What are the odds for the cube showing a number less than 3?
2/6=1/3
A die is tossed. Find the odds against rolling a number greater than 1.?
The probability of rolling a number greater than 1 is 5/6.
A coin is tossed until a head appears. what is the expectation of number of tosses required?
Usually, it takes 2-5 flips until a head appears.
A fair coin is tossed 3 times how many possible outcomes are there?
Each toss has 2 outcomes; so the number of outcomes for 3 tosses is 2*2*2 = 8
When a coin is tossed four time then mean and variance of the number of the head?
Mean = 2. Variance = 1.
A fair coin is tossed 10 times what are the expected mean and variance of the number of heads?
mean = 5, variance = 5
When 2 dice are tossed simultaneously the mean and variance of the sum of all dots on the turned-up faces can be determined?
Yes, quite easily.
How many different combinations are possible is a coin is tossed once and a number cube is tossed twice?
The number of combinations - not to be confused with the number of permutations - is 2*21 = 42.
How many different combinations are possible if a number cube is tossed once and a coin is tossed twice?
7878
How many different combinations are possible if number cube is tossed once and a coin is tossed three times?
48
How many different combinations are possible if a coin is tossed once and a number cube is tossed twice?
There are 72 permutations of two dice and one coin.
If coin is tossed seven times what is the number of sequences of heads or tails?
The number of sequences is 27 or 128.
What is the suffix of tossed?
tossed
What is a homophone for tossed?
Tossed - Toased
What is suffix for tossed?
The suffix for tossed is ed
What is the probability that the die tossed will land on a number that is smaller than 5?
The probability that the die tossed will land on a number that is smaller than 5 is 4/6 or 2/3. Smaller than 5 is 1 - 4 and 6 is the sample space.
