Subject
Bank Exam
Topic
সমন্বিত ১০ ব্যাংক ও আর্থিক প্রতিষ্ঠান (অফিসার - সাধারণ) - ০৮.০৩.২০২৪
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 blue 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 blue nor green?
ক)
2/3খ)
3/4গ)
7/19ঘ)
8/21Explanation
Total number of balls = (8 + 7 + 6) = 21 Let E = event that the ball drawn in neither blue nor green. = even that the ball drawn in blue. ∴ n(E) = 8 ∴ P(E) = n(E)/n(S) = 8/21Related questions
In how many ways can a group of 5 men and 2 women be made out of a total of 7 men and 3 women?'আপন পাঠেতে মন করহ নিবেশ'- বাক্যে 'পাঠেতে' শব্দটি কোন কারকে কোন বিভক্তি?একাধিক স্বাধীন বাক্যকে একটি বাক্যে লিখলে সেগুলোর মাঝখানে কোন চিহ্ন বসে?The area of a square is three-fifths the area of a rectangle. the length of the rectangle is 25 cm and its breadth is 10 cm less than its length. What is the perimeter of the square?কোনটি অস্তিবাচক বাক্য?In every 30 minutes the time of a watch increases by 3 minutes. After showing the correct time at 5 a.m. What time will the watch show after 6 hours?কোন বানানটি শুদ্ধ?If x > 2 and x < 3, then which of the following is positive?(I) (x - 2)(x - 3)(II) (2 - x)(x - 3)(III) (2 - x)(3 - x)