B. 0.7
ExplanationStep 1: Identify the concept: this is complement probability. Step 2: P(not A)=1-P(A)=1-0.3=0.7. Step 3: For not event subtract probability from 1.
Step 1: concept पहचानें: यह complement probability है। Step 2: P(not A)=1-P(A)=1-0.3=0.7। Step 3: Not event के लिए 1 में से probability subtract करें।
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