A coin is tossed twice. The probability of getting two heads is: A. 1/2 B. 1/4 C. 1/3 D. 1/6 相关知识点: 试题来源: 解析 B。每次抛硬币得到正面的概率是 1/2,抛两次硬币都是正面的概率 = 1/2×1/2 = 1/4。反馈 收藏
A fair coin is tossed twice. The probability of getting heads both times is: A. 1/2 B. 1/4 C. 1/3 D. 2/3 相关知识点: 试题来源: 解析 B。每次抛硬币得到正面的概率是 1/2,两次都得到正面的概率是 1/2×1/2 = 1/4。选项 A 是单次抛硬币得到正面的概率;选项 C 和 D 计算错误。
a fair coin is tossed twice.let X represent the number of heads obtained on the first toss and Y represent the total number of heads obtain in two tosses.a:derive the birvariate probability distribution for the variables X and Y.b:compute cov(X,Y) 相关知识点: ...
A fair coin is tossed twice. Consider the sample spaceS ={HH, HT, TH, TT } of equally likely simple events.We are interested in the following events:E_1=ahedonthefrsttan60° E_2=atailontheflsitos5 E_3=atailonthesecondtos5 E_4=ahcadonthcsecondtos5 For each pair of events, discus...
A coin is tossed n times and the number of heads that appear is recorded. For each of the following outcomes:decide if the coin is biased.n = 100 tosses and 51 heads appear 相关知识点: 试题来源: 解析 P =0.841 which is 0.05 So, there is not enough evidence to say the coin is ...
A coin is tossed. What is the probability of getting heads? A. 1/2 B. 1/3 C. 1/4 D. 2/3 相关知识点: 试题来源: 解析 A。解析:抛硬币只有正反两面,所以得到正面的概率是 1/2。B、C、D 选项错误理解抛硬币的概率。反馈 收藏
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 ...
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In a probability experiment, a coin is tossed 100 times. The number of heads is 45. What is the experimental probability of getting a head? A. 0.45 B. 0.5 C. 0.55 D. 0.4 相关知识点: 试题来源: 解析 A。本题中,硬币共抛掷 100 次,出现正面 45 次,实验概率即为正面出现的次数除以总次数...
A fair coin is tossed 3 times. What is the probability of at least two consecutive heads?( ). A. 18B. 14C. 38D. 12E. 34相关知识点: 试题来源: 解析 C 一枚均匀硬币投掷3次.则有至少连续两次徽面朝上的概率是多少? 首先,有23=8种方法可以按顺序翻转硬币. 获得连续两个头的方法是hht和thh...