probabilty question

Question

here is the chart

          Thursday    Friday  Saturday  Sunday  Monday  Tuesday  Wednesday  Total

60-69   0                0          0             0            0             0          0                0

50-59   2                2          0             0            3             2          1                10

40-49  1                 2          3             2            1             0          1                10

30-39  0                 2          0             1            0             2          1                 6

20-29  0                 0          0             1            0             0          1                 2

Total   3                 6          3             4             4            4          4                28

 

2.Compute the probability that an observation picked at random will be a Saturday observation.

 

 

Answer 1

 

Probability = favorable outcomes ÷ total possibilities

 

There are a total of 28 observations ... 3 of those occurred on a Saturday

 

Probability = 3/28 = .107 = 10.7%