The probability of an occurrence of event A is 0.7 and that of the occurrence of event B is 0.3 and the probability of occurrence of both is 0.4.

Explanation

To determine whether the statement about the probabilities of events A and B is true or false, we will analyze the given probabilities step by step.

### Given:
- Probability of event A, \( P(A) = 0.7 \)
- Probability of event B, \( P(B) = 0.3 \)
- Probability of both events A and B occurring, \( P(A \cap B) = 0.4 \)

### Step 1: Understand the properties of probabilities
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