exam Maths Puzzle Numerical Ability

What is (-48 squared timeds by -3 squared)divided by(-2 squared)?

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exam Other Question

If c1 and c2 are independent events , show that the following pairs of events are also independent
1. c1 complement and c2
2. c1 complement and c2 complement
how do you solve this problem the absolute value of z + z solve for z=4