If \(a\) and \(b\) represent positive single digits in the correctly worked computation above, what is the value of the

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B

C

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\(22\)
\(a3\)
\(+4b\)
___
\(90\)

If \(a\) and \(b\) represent positive single digits in the correctly worked computation above, what is the value of the two-digit integer \(ba?\)

A. 10
B. 15
C. 25
D. 51
E. 52

Answer: E

Source: Manhattan GMAT