exam Maths Puzzle Numerical Ability

In parallelogram WXYZ, WX=10, WZ=4, WY=13, and m<WZY=130 degrees

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exam Other Question

please help me solve this equation:0.6x-1.5=1.8 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