Answer:

Step-by-step explanation:
Given


Required
Determine the average speed
This is calculated as thus:

Convert time to hour:









42.57 x 46630= 75769 =3794874 =37489438790=3474936
Answer:
83.6155156
Step-by-step explanation:

Total socks in the drawers = 6 + 6 + 4 = 16
Probability of picking the first black sock = 4/16
Probability of picking the second black sock = 3/15
Probability of picking two black socks = 4/16 × 3/15 = 1/20