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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

Answer :

meerkat18
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.

What is the probability that a person who is above 35 years old has a hemoglobin level of 9 or above?

0.357

0.313

0.531

0.343

0.432


46/147=131

b.147

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