In the 8th grade there are 3 teams A, B, and C having 28, 35 and 37 st..
In the 8 th grade there are 3 teams A, B, and C having 28, 35 and 37 students respectively. The mean score of Team A is 60%, of Team B is 70% and of Team C is 85%. Find the mean score of the entire 8th grade. => 75.75 or 72.75 ..
A teacher wants 5 of her 15 students to write a skill test. In how man..
A teacher wants 5 of her 15 students to write a skill test. In how many ways can she select 5 students? => 3008 or 2998 or 3013 or 3003..
A random sample of 81 students was tested for the problem solving appr..
A random sample of 81 students was tested for the problem solving approach skills. The variance of the scores obtained from the sample was found to be 144. Find the 80% confidence interval for the variance and standard deviation. Assume that the variable is normally distributed. => 122 &l..
A seminar is given to the students of five classes of a school on the ..
A seminar is given to the students of five classes of a school on the importance of communication skills. The number of students of each class who attended the communication skills development classes before and after attending the seminar are listed in the table. At 95% confide..
A school enrolls students based on their performance in the written te..
A school enrolls students based on their performance in the written test and communication skill test. Each test has a maximum score of 75. The graph shows the inequalities that tells the status of a candidate: For admission x + y ≥ 50 For scholarship 4 x + 5 y ≥ 300 For accommodati..
A school enrolls students based on their performance in the written t..
A school enrolls students based on their performance in the written test and communication skill test. Each test has a maximum score of 75. The following formulae are used. For admission x + y ≥ 50 For scholarship 4 x + 5 y ≥ 300 For accommodation + food 3 x + 4 y ≥ 300 where x r..
Main Features of Modern Periodic Table
. They consist of metals. 7. The Zero group consists of 'Noble gases'. 8. There are 7 horizontal rows in the periodic table. These are called the periods. 9. In a period, the number of valence shell remains the same for all elements. However, the number of electrons in the valence shell i..
Mendeleev's Periodic Table
Grp:1 Grp:2 Grp:3 Grp:4 Grp:5 Grp:6 Grp:7 Grp:8 H=1 - - - - - - - Li=7 Be=9.4 B=11 C=12 N=14 O=16 F=19 - Na=23 Mg=24 Al=27.3 Si=28 P=31 S=32 Cl=35.5 - K=39 Ca=40 - Ti=48 V=51 Cr=52 Mn=55 Fe=56 Co=..
Editing
Introduction - This tests the student's skill in detecting mistakes. Having acquired comprehensive knowledge of English grammar, he should be able to apply his skills effectively in the following exercise..
Population as a Resource
Population supplies trained and skilled labour to the country. It is important for the economic growth. If the skilled labour pioneer is properly utilised in industries, it will result in large scale production and the cost of production will fall, the price of products will dec..
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