Digital SAT Math Practice Question #2500
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Desmos / Statistical Reason: Filter conditional probability denominators carefully — 'out of what total' is always the key.
Adding a constant $c$ to every value increases the mean by $c$ ($15 + 5 = 20$), but does not affect the spread (standard deviation remains 3)....
Distractor Analysis: Trap choice eliminates careless test-takers who confuse roots with coordinates...
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