exam Maths Puzzle Numerical Ability

Mean equal to 15 and standard deviation equal to 5. Find the probabilities associated with getting:
a. A 15 or above
b. Between a 15 and an 18
c. A 13 and above

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exam Other Question
In parallelogram WXYZ, WX=10, WZ=4, WY=13, and m<WZY=130 degrees Can you please help me solve using the elimination method?

8x - 5y = 8
2x + 3y = 2