The average of a1, a2, a3, a4 is 16. Half of the sum of a2, a3, a4 is – McqOptions

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1.	The average of a1, a2, a3, a4 is 16. Half of the sum of a2, a3, a4 is 23. What is the value of a1
A.	18
B.	21
C.	26
D.	31
Answer» B. 21

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