If + denotes ÷, × denotes -, - denotes ×, and ÷ denotes +, what is the value of the following expression:
124 + 4 × 5 – 6 ÷ 6 + 3 = ?
Substitute the symbols with their new meanings: 124 ÷ 4 - 5 × 6 + 6 ÷ 3 = 31 - 5 × 6 + 2 = 31 – 30 + 2 = 3 So, the value of the expression is 3.
Given that E and F are events such that P(E) = 0.7, P(F) = 0.4 and P(E ∩ F) = 0.3, find P(E|F) and P(F|E)
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