Neco 2023 Geography Question 27

Practice objective / multiple choice question 27 from the 2023 Neco Geography examination.

Neco 2023 Geography Objective / Multiple Choice Hard Difficulty
Question 27 NECO • 2023 • GEOGRAPHY • objective

In a certain flood‑prone region, the probability of heavy rainfall during the rainy season is 0.30. If heavy rainfall occurs, the probability that the river overflows is 0.60. Independently, the probability that the dam fails during the season is 0.02, and a dam failure always causes overflow. (a) Find the overall probability that overflow (flood) occurs. (b) Given that overflow has occurred, find the probability that it was caused by heavy rainfall.

Answer Options

A. Overall probability ≈0.210; probability heavy rainfall given flood ≈0.857
Correct Answer B. Overall probability ≈0.196; probability heavy rainfall given flood ≈0.898
C. Overall probability ≈0.200; probability heavy rainfall given flood ≈0.900
D. Overall probability ≈0.180; probability heavy rainfall given flood ≈0.950
Correct Answer
B
Correct Option:
Overall probability ≈0.196; probability heavy rainfall given flood ≈0.898

About This Question

This is Neco 2023 Geography Question 27. It is one of the objective questions from the 2023 Neco Geography examination.

Difficulty level: Hard .

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