A pair of dice is thrown 200 times. If getting a sum of 9 is considered a success, then find the mean and the variance respectively of the number of successes.
A. \(\frac{400}{9}, \frac{1600}{81}\)
B. \(\frac{1600}{81}, \frac{400}{9}\)
C. \(\frac{1600}{81}, \frac{200}{9}\)
D. \(\frac{200}{9}, \frac{1600}{81}\)
Answer:B
A pair of dice is thrown 200 times. If getting a sum of 9 is considered a success, then find the mean and the variance respectively of the number of successes.
A. \(\frac{400}{9}, \frac{1600}{81}\) B. \(\frac{1600}{81}, \frac{400}{9}\) C. \(\frac{1600}{81}, \frac{200}{9}\) D. \(\frac{200}{9}, \frac{1600}{81}\)