exam Maths Puzzle Numerical Ability

On one day, the probability that u will miss the bus is 1/7. Find the probability that u will miss ur bus on just one of two particular consecutive days.

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exam Other Question

Multiply : (4x^2y^2), (6ax^2y^6)

The answer I came up with is: 24ax^4y^12
Explanation for my answer: I multiplied 4*6, then x^2 and left the "a" as is. I also muliplied y^2 * y^6. Please help me thank you! The length of a rectangle is 4 times the width. The perimeter is 90 cm. Find the width and length.