Please see the following carefully and answer questions. In an Examination 500 candidates appeal for test in English, Hindi and Mathematics. The diagram presents the number of candidates who failed in different tests :

What is the number of the candidates who failed in at least two subjects ?

39

The number of the candidates who failed in two subjects are

English and Hindi= 10 and 5

English and Mathematics = 12 and 5

Hindi and Mathematics = 12 and 5

The number of the candidates who failed in at least two subjects will be 12+12+10+5=39