exam Maths Puzzle Numerical Ability

Please show me how to solve this. Thanks!

How do I get the answer to this question? (A u B u C)' (the u is for union)

And what is the difference in these two expressions

Read Solution (Total 0)

exam Other Question
The formula for calculating the amount of money returned for an initial deposit money into a bank account or CD (Certificate of Deposit) is given by

A is the amount of returned could someone help me solve this
x+5y=10
-2x-10y=-20