IBPS SO Prelims Exam Model Paper 10

GIVEN :
Total number of animals = 338
Total legs count of animals = 1052
CONCEPT :
Ratio method
ASSUMPTION :
Let the number of tigers be t & number of ducks be d.
CALCULATION :
∴ t + d = 338 ---- (1)
As we know tigers have 4 legs while ducks have 2.
∴ Total leg counts = leg count of tigers + leg count of ducks
∴ 1052 = 4t + 2d
∴ 2t + d = 526 ---- (2)
Subtracting equation 1 from equation 2-
t = 188
∴ substituting the value of t in equation 1-
∴ d = 150
∴ Ratio of number of ducks to tiger = 150 ∶ 188 = 75 ∶ 94
∴ Answer is 75 ∶ 94