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Under the ABO method, a person with an unknown blood group loses a lot of blood in a road accident and needs an immediate blood transfusion. A friend of his, who has a valid certificate of his blood group, requests for blood donation without any delay. The blood group of the blood donor is:
ABO blood groups is a good example for both . . . . . . . . and multiple allelism.
Fact 1: All dogs like to run.
Fact 2: Some dogs like to swim.
Fact 3: Some dogs look like their masters.

If the first three statements are facts, which of the following statements must also be a fact?
I: All dogs who like to swim look like their masters.
II: Dogs who like to swim also like to run.
III: Dogs who like to run do not look like their masters.
In a blood donation camp, 100 people donated blood. 37 of them had blood group ’A’, 31 had blood group ‘B’, 14 had blood group ‘O’ and rest had blood group ‘AB’. If a sample is chosen at random, what is the probability that the sample contains blood of group ‘AB’?
In a group, 29 people like to watch movies, 35 people like to watch web series and 34 people like to watch YouTube videos. Also, 13 people like to watch only movies, 21 people like to watch only web series and 15 people like to watch only YouTube videos. 4 of them like to watch only movies and web series. 3 of them like to watch movies, web series and YouTube videos as well. How many people like to watch both movies and YouTube videos?
Consider the following statements about the Open and Closed Blood Circulatory System:   A) Open blood circulatory system does not contain special blood vessels to carry oxygenated and deoxygenated blood, while in the closed blood circulatory system blood vessels are present. B) Oxygenated and Deoxygenated blood gets mixed in the closed blood circulatory system, while oxygenated and deoxygenated blood does not get mixed in the open blood circulatory system. Choose the correct statement.
The diagram shows the survey on a sample of 197 persons with reference to their preferences for three seasons that is winter, summer, and spring. 120 persons like spring season, 100 like Winter Season, and 90 like summer season. 50 persons like both spring and winter season only, 25 like both summer and winter season only, and 18 like both spring and summer season only. 10 persons like all three seasons. How many persons like only the winter season?
In a class of 38 students, 18 students like cricket, 20 like football and 15 like chess. 8 students like both cricket and chess and 3 out of these also like football. 7 students like only cricket and 6 students like only chess. How many students like only football?
Read the given information and answer the question asked by choosing the most appropriate option. In a class, 47 students like Oswald, 44 students like Dexter and 47 students like Ben Ten. Also, 29 students like both Oswald and Dexter, 23 students like both Dexter and Ben Ten, 21 students like both Ben Ten and Oswald and 15 students like all the three. How many students like only Ben Ten?
Read the given information and answer the question asked by choosing the most appropriate option. In a class, 80 students like candies, 99 students like cookies and 102 students like juice. Also, 27 students like only candies and cookies, 28 students like only juice and cookies, 19 students like only candies and juice and 21 students like all the three. How many students like only juice?