A group of four numbers have an average (Arithematic mean) of 17. The first three numbers are 9,32, 19. what is the other number ?
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Answer:
8
Step-by-step explanation:
17= (9+32+19+ X)/4
17x4= 60+ X
68= 60+ X
68-60= X
X = 8
therefore the other number is 8
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