# Hard SAT Math Question 47 — Video Explanation | 1600.now

Source: https://1600.now/hard/47

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47

Data set A contains the lengths of $120$ lizards and has a mean of $10$ inches. Data set B contains the lengths of $40$ different lizards, with a mean of $15$ inches. Data set C contains the lengths of all $160$ lizards from data sets A and B. What is the mean, in inches, of Data set C?