Subject
Bank Exam
Topic
Trust Bank Ltd. - Management Trainee Officer - 2016
In a box, there are 8 red, 7 blue and 6 green balls. One ball is picked up randomly. what is the probability that it is neither red nor green ?
In a box, there are 8 red, 7 blue and 6 green balls. One ball is picked up randomly. what is the probability that it is neither red nor green ?
ক)
1/3খ)
3/4গ)
7/19ঘ)
8/21Explanation
অনুবাদঃ একটি বক্সে ৪টি লাল, 7টি নীল এবং 6টি সবুজ বল আছে । একটি বল দৈবভাবে তোলা হলে লাল ও সবুজ কোনটাই হবে না এমন বল আসার সম্ভাবনা কত ? Solution: মোট Ball আছে = 8 + 7 + 6 = 21 টি 21 টি Ball এর ভেতর থেকে 1টি Ball randomly উঠালে যদি তা Red বা Green না হয়, তবে তা অবশ্যই Blue হবে। ফলে ঐ 21 টি Ball হতে 1 টি Ball randomly pick করলে তা Blue হবার Probability = 7/21 = . Shortcut: Probability = Blue/Total =Related questions
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