What is the probability that a person has a hemoglobin level above 11 if he is in the 25-35 age group? hemoglobin
level person's age
less than
25 years 25-35 years above 35 years total
less than 9 21 32 76 129
between 9
and 11 49 52
above 11 69 40
total 139 128 162 429 a. 0.125
b. 0.298
c. 0.344
d. 0.356
e. 0.687

Person's Age:            25 years          25-35 years          35 years       Total
Hemoglobin level
Less than 9                    21                      32                           76              129
Between 9 and 11        49                      52
Above 11                        69                                                      40
Total                              139                    128                         162             429

128 - 32 - 52 = 44 
44/128 = 0.34375  Choice C.