PROBABILITY - 6 QUESTIONS COMPETITION
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Subscribe to the channel and ask me your questions! =] ▶ Want to support the channel? =D PIX: [email protected] PDF sheet: https://drive.google.com/open?id=12Qu... Probability 1. The probability of a football player scoring a goal when taking a penalty , is 80%. If this player takes two consecutive penalties, the probability of him scoring the goal, in both kicks, is equal to: a) 16% b) 20% c) 32% d) 64% e) 80% 2. The ages of the people who work in a certain company are distributed in ranges as shown in the following table: Age Range: ► From 20 to 29 years old: 12 people ► From 30 to 39 years old: 20 people ► From 40 to 49 years old: 34 people ► With 50 years old or more: 14 people If one of these people is chosen at random, the probability that they are under 40 years old is: a) 25% b) 30% c) 35% d) 40% e) 45% 3. A team of athletes is made up of four men and six women. Two different athletes from that team will be drawn to represent the team in a ceremony. The probability that two women are drawn is equal to: a) 1/8 b) 1/5 c) 1/4 d) 1/3 e) 1/2 4. The following Figure shows an electronic game in which, with each move, the arrow, after being rotated, stops, randomly and with equal probability, in any of the eight spaces with the letters of the word LIQUIGÁS. L SI AQ GU I A player is only a winner if, in two consecutive moves, the arrow points to the same letters. The probability of a player winning, making just two moves, is equal to: a) 4/64 b) 8/64 c) 10/64 d) 14/64 e) 16/64 5. In a survey carried out in a school students were asked two questions. 150 answered yes to both; 350 answered yes to the first; 200 answered yes to the second and 250 answered no to both. If a student is chosen at random, what is the probability that he or she answered “no” to the first question? a) 1/13 b) 5/13 c) 6/13 d) 2/13 e) 3/13 6. Maria and Joana are participating in a competition in which the probability of at least one of them being victorious is 90% . If the probability of Maria winning the competition is 60%, the probability of Joana being victorious is: a) 65% b) 70% c) 75% d) 80%
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