BPSC (Bihar PCS) 2022 · Question 104 of 150
Mental Ability
At 150 per dozen the loss is 25%, so cost price is 150/0.75 = 200 per dozen; a 20% profit needs 200 x 1.2 = 240 per dozen.
Source: 67th BPSC Prelims Re-Exam 2022 (Set D)
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