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Question: In a class, there are 15 boys and 10 girls . Three students are selected at random. The probability that 1 girl and 2 boys are selected, is –
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Question: In a class, there are 15 boys and 10 girls . Three students are selected at random. The probability that 1 girl and 2 boys are selected, is –
Question 1: In a class, there are 15 boys and 10 girls . Three students are selected at random. The probability that 1 girl and 2 boys are selected, is -
View topic: বিন্যাস, সমবেশ ও সম্ভাব্যতা (Permutation, Combination and Probability)
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Source: সিনিয়র অফিসার ১৫. ১১.২০১৯
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Answer: 21/46
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A jogger running at 9 km/hr alongside a railway track is 240 meters ahead of the engine of a 120 meters long train running at 45 km/hr in the same direction. In how much time will the train pass the jogger?
A die is rolled twice. What is the probability of getting a sum equal to 9?
In a simultaneous throw of two dice what is the probability of getting a doublet?
A number is selected at random from 40 to 59 inclusive . What is the probability that the number is prime number ?
এক প্যাকেট তাস থেকে একটি তাস দ্বৈবভাবে নেয়া হল। তাসটি হরতন বা চিরা হবার সম্ভাবনা কত?
একটি গোলাকার মুদ্রা টেবিলে রাখা হল । এই মুদ্রার চারপাশে একই মুদ্রা কতটি রাখা যেতে পারে যেন মুদ্রাগুলো মাঝের মুদ্রাটিকে এবং তাদের দু'পাশে রাখা দুটি মুদ্রাকে স্পর্শ করে ।
When tossed, a certain coin has equal probability of landing on either side. If the coin is tossed 3 times, what is the probability that it will land on the same side each time?
12 marbles are selected at random form a large collection of white , red, green and yellow marbles . The number of marbles of each color is unlimited. Find the probability that the selection contains at least one marble of each color ?
In a class of 60, where girls are twice that of boys , Kamal ranked seventeenth from the top . If there are 9 girls ahead of Kamal , how many boys are after him in rank ?
Find the probability of selecting a prime number from a set of number 1 to 15 (both inclusive).
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জ্যামিতি (Geometry)
বাংলাদেশের কৃষি, শিল্প, বাণিজ্য ও সম্পদ
অনুসর্গ বা কর্মপ্রবচনীয়
ঐকিক নিয়ম (Unitary Method)
এক কথায় প্রকাশ বা বাক্য সংকোচন
Subject-Verb Agreement
বাংলা ভাষা ও বাংলা ব্যকরণ
ভগ্নাংশ (Fraction)
গড় (Average)
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