Ron is training for a marathon. He runs at 50% of his original training speed on Monday, and at 4 miles per hour less than his o
riginal training speed on Tuesday. If the sum of his running speeds of the two days is 17 miles per hour, what was his original training speed?
6.51
14
21
8.67
Given: p = 90% = 0.9, the probability that the seed grows into a healthy plant. Therefore q = 1 - p = 0.1, the probability that the seed will not grow into a healthy plant.
n = 7, the number of seeds planted. Let r = 4, expected number of seeds that will grow.
Use the Binomial distribution to determine P(4 of 7 seeds will grow) = ₇C₄ p⁴q⁽⁷⁻⁴) = 35*(0.9⁴)*(0.1³) = 0.023
P(4 of 7 seeds will not grow) = 1 - P(4 of 7 seeds will grow) = 1 - 0.023 = 0.977 or 97.7%