Consider the given question and decide which of the following statements is sufficient to answer the question.
If X scored an average of 50 marks in History, Language and Science, how much did he score in Science?
Statements:
1. His average score in History and Language is 25.
2. He got 30 marks in Language.
Average marks of (history+science+language)=50
Total marks in (history+science+language)= $$3\times\ 50=150$$
Average marks of (history+language)= 25
Total marks in (history+language) =$$2\times25=50$$
we subtract eq-1 nd eq-2
science=150 - 50 = 100.
only 1 alone is sufficient and statement 2 alone is not sufficient.Â
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