There are 145 students in the first three standards The ratio of number of students in the first and...........

Quantitative Aptitude ( CCS) Ratio, Proportion

There are 145 students in the first three standards. The ratio of number of students in the first and the second standards is 2 : 3, while that of students in standards second and third is 4: 3. Find the number of students in 2^nd standard.

40 yrs

60 yrs

45 yrs

65yrs

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Explanation:

Total students = 145.

Ratio of students in 1st and 2nd standards = 2 : 3
Ratio of students in 2^nd and 3^rd standards = 4 : 3
Hence combined ratio i.e. 1^st: 2^nd: 3^rd is 8 : 12 : 9.
∴ Number of students in each standard = (145 × 8)/29 = 40,

(145 × 12)/29 = 60 and (145 × 9)/29 = 45.

Hence, option 2 is the correct answer.