6
9
12
15
Source: ১৭ তম বিসিএস( প্রিলিমিনারি) (15-09-1995)
Answer: 9
Explanation:
Write Reply...
You should read | Questions
Three houses are available in a locality. Three persons apply for the houses. Each applies for one house without consulting others. The probability that all the three apply for the same house is -
A man can hit a target once in 4 shots. If he fires 4 shots in succession , what is the probability that he will hit his target?
In a zoo, there are Rabbits and Pigeons. It heads are counted s, there are 200 and if legs are counted there are 580. How many pigeons are there ?
Tickets numbered 1 to 20 are mixed up and then a ticket is drawn at random. what is the probability that the ticket drawn has a number which is a multiple of 3 or 5?
In how many ways can the letters of the word 'ARRANGE' be arranged in which the two Rs and two As come together ?
Certain numbers of children were playing a game of football. There was a trial taking place on the field. In this trial the probability that a goal is scored is 2/5. The probability that a gril hits a goal is 7/10 whereas the probability than a boy hits a goal is 1/5. What will be the probability that not only a goal is hit but it is also hit by a boy?
In a box there are 10 apples and 2/5th of the apples are rotten . If three apples are taken out from the box, what will be the probability that at least one apples is rotten .
A box contains 20 electric bulbs, out of which 4 are defective. Two bulbs are chosen at random form this box. The probability that at least one of these is defective is ___
লুডু খেলার দুটি ছক্কা একসাথে ফেলে প্রাপ্ত সংখ্যা ২টি যোগ করলে যোগফল ১০ হবার সম্ভবনা কত?
10 টি জিনিসের মধ্যে 2 টি এক জাতীয় এবং বাকিগুলো ভিন্ন ভিন্ন জিনিস। ঐ জিনিসগুলো থেকে প্রতিবারে 5 টি নিয়ে কত প্রকারে বাছাই করা যায়?
View all Questions
You should read | Topic
ঐকিক নিয়ম (Unitary Method)
উপসর্গ
যুদ্ধ, চুক্তি ও সম্মেলন
মহাদেশ ও দেশ পরিচিতি
বাচ্য ও বাচ্য পরিবর্তন
শতকরা ও লাভ-ক্ষতি (Percentage and Profit and loss)
নল ও চৌবাচ্চা (Pipes and Cistern)
কম্পিউটার এর ইতিহাস ও বিবিধ
সময়, দূরত্ব ও গতিবেগ (Time, distance & speed)
Number and Gender
User Avatar

Articles

0

Comments

0

Rating

0

Login