exam Maths Puzzle Numerical Ability

A particular standardized test has a mean score of 450 with a standard deviation of 108. A student scored 355 on this test. Calculate the student�s z-score.

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exam Other Question

x + 3 less than or equal to 2x + 1 and -4x < -8 It was found that 60% of American victims of health care fraud are senior citizens. If 10 victims are randomly selected, find the probability that exactly 3 are senior citizens.