If P means addition, Q means subtraction, R means multiplication, S means division, what is the value of 30P2055Q4R3 :
A38
B40
C22
D28
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Related Questions:
Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusion(s) logically follow(s) from the statement(s).
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Some metals are iron.
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