Q) A departmental store sends bills to charge its customers once a month. Past experience shows that 70% of its customers pay their first month bill in time. The store also found that the customer who pays the bill in time has the probability of 0.8 of paying in time next month and the customer who […]
A departmental store sends bills to charge its customers once a month. Past experience Read More »
Q) In a survey on holidays, 120 people were asked to state which type of transport they used on their last holiday. The following pie chart shows the result of the survey. Observe the pie chart and answer the following questions:1 (i) If one person is selected at random, find the probability that he/she travelled
Q) In a pack of 52 playing cards one card is lost. From the remaining cards, a card is drawn at random. Find the probability that the drawn card is queen of heart, if the lost card is a black card. Ans: We have 52 cards in a pack. Step 1: From the given pack
In a pack of 52 playing cards one card is lost. From the remaining cards, Read More »
Q) From a group of 3 boys and 2 girls we select two children. What is the set representing the event:i. one girl is selectedii. at least one girl is selected Ans: Let’s first find out all possible sets of selecting two children:Let 3 boys are B1, B2, B3 and 2 girls are G1, G2, then the
From a group of 3 boys and 2 girls we select two children. What is the set Read More »
Q) A middle school decided to run the following spinner game as a fund-raiser on Christmas Carnival. Making Purple: Spin each spinner once. Blue and red make purple. So, if one spinner shows Red (R) and another Blue (B), then you ‘win’. One such outcome is written as ‘RB’.Based on the above, answer the following
Q) If a fair coin is tossed twice, find the probability of getting ‘at most one head’. Ans: When we toss 2 fair coins, here are the possible outcomes: HH, HT, TH, TT Here, we need to get at most 1 head. It means we will include outcomes of getting 1 head and no head. Since
If a fair coin is tossed twice, find the probability of getting ‘at most one head’. Read More »
Q. Computer-based learning (CBL) refers to any teaching methodology that makes use of computers for information transmission. At an elementary school level, computer applications can be used to display multimedia lesson plans. A survey was done on 1000 elementary and secondary schools of Assam and they were classified by the number of computers they had.
Q) A bag contains 4 red, 3 blue and 2 yellow balls. One ball is drawn at random from the bag. Find the probability that drawn ball is (i) red (ii) yellow. Ans: