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If the head of a coin is worth 1 point and the tail is worth 2 points,
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31 Mar 2022, 02:00
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If the head of a coin is worth 1 point and the tail is worth 2 points, what is the probability that the sum of the results of 4 tosses is at least 5 points?
Re: If the head of a coin is worth 1 point and the tail is worth 2 points,
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10 Apr 2022, 08:33
2
first let's see what are the point that we get 1. All head = 1+1+1+1 =4 2.one tail and 3 head = 2+1+1+1 =5 3.two tails and = 2+2+1+1=6 we can see that except all head even if one tail comes in it gives 5 or higher...so we should use 1- unfavourable ..to find the probability so getting 4 points (= all heads) = 1/16 required probability =1-1/16 = 15/16
Re: If the head of a coin is worth 1 point and the tail is worth 2 points,
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10 Apr 2022, 15:33
1
Possible outcomes:
4 head: 1+1+1+1 = 4 3 head and 1 tail = 1+1+1+2 = 5 Adding any tail from now, the sum is greater than 5. Therefore, the target outcome is every outcome except 4 heads and that means 1 - 1/16 = 15/16. Where does 1/16 come from? It´s the probability to get 4 head: 1/2 x 1/2 x 1/2 x 1/2
If the head of a coin is worth 1 point and the tail is worth 2 points,
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06 May 2022, 01:27
1
Carcass wrote:
If the head of a coin is worth 1 point and the tail is worth 2 points, what is the probability that the sum of the results of 4 tosses is at least 5 points?
Total outcomes = 24=16 If the sum of the results is less than 5, we can have only 1 outcome for it i.e. HHHH = 4 points So, we will have 15 cases where the sum of the results is 5 or more Thus, required Prob. = 1516
Hence, option E
gmatclubot
If the head of a coin is worth 1 point and the tail is worth 2 points, [#permalink]