百度试题 结果1 题目A fair coin is tossed 3 times. What is the probability of at least two consecutive heads? C( A)1/8 (B) 1/4 ( C ) 3/8 (D) 1/2 (B) 3/4 相关知识点: 试题来源: 解析 C 反馈 收藏
一枚硬币掷3次,每次都有正反两种可能,所以总共有2^3=8种可能的结果。 第二步,我们计算至少有2次连续正面朝上的结果数。这种情况有3种可能:正正反、正正正、反正正。 第三步,我们根据条件概率的公式,计算至少有2次连续正面朝上的概率。概率等于满足条件的结果数除以总的结果数,即3/8。
百度试题 题目If a fair coin is tossed twice, what is the probability of obtaining heads both times? A. 1/4. B. 1/2. C. 3/4. D. 1.相关知识点: 试题来源: 解析 A 略 反馈 收藏
A fair coin is tossed repeatedly. The probability that the first head occurs on the nth toss is P(n)=(12)^n. When this game is repeated many times, the average number of tosses required until the first head occurs isE(n)=∑limits_(n=1)^∞nP(n).(This value is called theexpected...
(n = 2) What is the probability of getting exactly 1 head? (X = 1) Sample Space: {HH HT TH TT} Pr(X = 1) = 2 4 = 0.5 when n = 2 A fair coin is tossed 3 times. (n = 3) What is the probability of getting exactly 2 heads? (X = 2) Sample Space: {HHH HHT HTH ...
If a coin is tossed 7 times, what is the probability of getting 6 heads? A fair coin is tossed twice. What is the probability that it lands on heads exactly once? If you have a fair coin and want to calculate the probability that if you flip the coin 20 ti...
If a fair coin is tossed twice, what is the probability of obtaining heads both times?A. 1/4.B. 1/2.C. 3/4.D. 1. 正确答案:A 分享到: 答案解析: The probability of tossing a head, H, is P(H) = 1/2. Since these are independent events, the probability of two heads in a ...
Three eggs ... 06:16 Pair of fair dice is thrown. Let X be the random variable which denote... 06:55 A fair coin is tossed four times. Let X denote the number of heads ... 07:13 A fair die is tossed. Let X denote twice the number appearing. Find... 03:21 A fair die is...
If 1 coin is tossed three times, Indicate the probability of the following events at least two heads / tails. View Solution Two coins are tossed simultaneously. Then, the value of E(X), where X denotes the number of heads is View Solution ...
Suppose that a perfectly balanced coin has been tossed four times. Heads appeared on all four tosses. Then, on the fifth trial, what is the probability that the head appears? Suppose you flip two fair coins. Find the following probabilities. a. No heads b. ...