The sample space diagram shows there are 6 ways of making a 7, out of a total of 36 possible outcomes. Therefore, the probability of rolling two dice and the sum being 7 is \(\frac{6}{36} = \frac{1}{6 ...

The theoretical probability of getting a head when you flip a fair coin is \(\frac{1}{2}\), but if a coin was actually flipped 100 times you may not get exactly 50 heads, although it should be close ...

Following 2017, the NHK Broadcasting Culture Research Institute carried out an experimental web/mail mixed-mode survey using probability sampling from the Basic Resident Register to validate its ...