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2 solved questions on Blood Group Probability
CSS 2020General Science & AbilityQ. 8
(a) What do you understand by systematic sampling? Discuss its types. (b) Blood groups of inhabitants of a village were checked. It was found that 600 people possessed blood group A, 650 possessed blood group B, 550 had blood group AB and 200 have blood group O. (i) Calculate the probability of having blood group B. (ii) Calculate the probability of having blood group O. (c) A group of 50 men can construct 20 kilometer road in 40 days. How long will 70 men take to complete same length of road? (d) Zahid left a property worth Rs 1,750,000. His family had to pay off a debt of Rs 150,000. The rest of money was distributed between a son and a daughter. How much did each child receive if share of a son was double than that of a daughter?
#cssnexus #Systematic Sampling #Types of Sampling #Probability
CSS Nexus6 Nov 2026
CSS 2016General Science & AbilityQ. 12
(a) Classification of blood groups is based on the presence or absence of inherited antigenic substances on the surface of red blood cells. In a survey of British population the blood group distribution among 1000 people was as follows: 300 had blood group A, 325 had blood group B, 250 had O and 125 AB. Out of this group a person was selected at random, calculate his probability of having blood group AB. (b) Five friends Ahmad, Ali, Akbar, Nasir and Shehbaz went on summer vacation to five cities namely V, W, X, Y and Z by five different modes of transport, that is by bus, train, aeroplane, car and boat from point A. Akbar went to Y by car and Ali went to X by air. Nasir travelled by boat whereas Shehbaz went by train. For X and W there is no bus service. The person who went to X did not use boat to travel. Now answer the following questions. (i) How did Ahmad travel and where did he go? (ii) Which mode of transport was used by the person who travelled to X city?
#cssnexus #Probability #Blood Groups #Analytical Reasoning
CSS Nexus6 Nov 2026