Answer:
The probability that a General Practitioner or a doctor under the age of 40 is 0.5652
Step-by-step explanation:
Given that:
7/23 doctors are General Practitioners
9/23 are under the age of 40
3 are both General Practitioners and under the age of 40.
The probability that a General Practitioner or a doctor under the age of 40 is:
P(General Practitioner) + P(Under the age of 40) - P(both General Practitioner and under the age of 40)
= 7/23 + 9/23 - 3/23
= (7 + 9 - 3)/23
= 13/23
= 0.5652