exam Maths Puzzle Numerical Ability

The weather news says there is a 30% chance of rain this weekend. Make an area to represent all possibilities. Find the probability that it will rain.
a. No days
b. One day
c. Two days

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exam Other Question

An audio store buys 60 cassettes. It gives away 3 cassettes free for a contest. It sells the remaining cassettes for 2 time the purchase price. The profit on the cassettes is $ It takes Tom 3 hours less to paint a fence than Jim. If the two boys work together, they can paint the fence in 2 hours. How many hours would each boy, working alone, need to paint the fence?