3 2/5
Just add all the time and subtract total time.
Hope this helped !
Answer: a) 0.8413, b) 0.9987.
Step-by-step explanation:
Since we have given that
Mean = 3 pounds
Standard deviation = 0.25 pounds
n = 28 bricks
So, (a) What is the probability that all the bricks in the sample exceed 2.75 pounds?
b) What is the probability that the heaviest brick in the sample exceeds 3.75 pounds?
Hence, a) 0.8413, b) 0.9987.
Set x as Joe's (current) age, and y as Mary's age (current). We can start building equations; x = y - 2 + 10, or x = y + 8. Now, from the second statement, x - 2 = 2(y - 2). Substituting, we obtain y = 10, and x = 18.