Mathematical examination of bank job recruitment ব্যাংক জব নিয়োগ পরীক্ষা গণিত Probability
Probability or Chance
Probability or chance is a common term used in day-to-day life. For example, we generally say, ‘it may rain today’. This statement has a certain uncertainty.
Probability is quantitative measure of the chance of occurrence of a particular event.
Experiment
An experiment is an operation which can produce well-defined outcomes.
Random Experiment
If all the possible outcomes of an experiment are known but the exact output cannot be predicted in advance, that experiment is called a random experiment.
Examples
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Tossing of a fair coin
When we toss a coin, the outcome will be either Head (H) or Tail (T)
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Throwing an unbiased die
Die is a small cube used in games. It has six faces and each of the six faces shows a different number of dots from 1 to 6. Plural of die is dice.
When a die is thrown or rolled, the outcome is the number that appears on its upper face and it is a random integer from one to six, each value being equally likely.
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Drawing a card from a pack of shuffled cards
A pack or deck of playing cards has 52 cards which are divided into four categories as given below
- Spades (♠)
- Clubs (♣)
- Hearts (♥)
- Diamonds (♦)
Each of the above mentioned categories has 13 cards, 9 cards numbered from 2 to 10, an Ace, a King, a Queen and a jack
Hearts and Diamonds are red faced cards whereas Spades and Clubs are black faced cards.
Kings, Queens and Jacks are called face cards
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…. তে ক্লিক কর।