Subject
Bank Exam
Topic
বাংলাদেশ ব্যাংক অফিসার (ক্যাশ) - ২১.০৭.২০২৩
In a group of 135 persons, 50% people contributed tk. 40 each, 30% contributed Tk. 60 each and the remaining persons contributed Tk. 80. Find the average contribution for the group?
In a group of 135 persons, 50% people contributed tk. 40 each, 30% contributed Tk. 60 each and the remaining persons contributed Tk. 80. Find the average contribution for the group?
ক)
Tk. 50খ)
Tk. 54গ)
Tk. 60ঘ)
Tk. 62Explanation
total people = 135 Since 50% of them contributed Tk. 40 ∴ amount contributed by these 50% = (135/2) × 40 = 2700 Since 30% of them contributed TK. 60 ∴ amount contributed by these 30% = (30/100) × (135) × 60 = 2430 and remaining 20% of them contributed Tk. 80 ∴ amount contributed by these 20% = (20/100) × 135 × 80 = 2160 ∴ Total amount contributed = 2700 + 2430 + 2160 = 7290 ∴ Average contribution = 7290/135 = 54Related questions
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