Answer: Jaleel´s method is correct and the right option is option number D
Step-by-step explanation:
its because 2(x-2)
= 2x-4
note 2 is multiplied with both x and -2!
Yes you take 3 times 4 and receive 12 and 5 times 4 and receive 20
Those are the ranges for one tandard deviation below the mean and one standard deviation above the mean, and we know that 68% of the data falls in that range, so the probability that a randomly chosen worker makes that much is 68%
D = {16, 19, 21}
E = {16, 18, 19, 20}
D ∩ E = {16, 19}
