A positive integer is selected at random and is divided by 7. What is the probability-that the remainder is not 1?
1
Which of the following is not a 'proposition ?
Sum of 2 and 5 is 7
An angle consists' of two rays and one vertex
Is 7 the sum of 2 and 5 ?
Sum of 2 and 5 is 6
Which of the following is a perfect number ?
28
36
10
All of these
A.
28
In number theory, a perfect number is a positive integer that is equal to the sum of its proper positive divisors, that is the sum of its positive divisors excluding the number itself, so from the option, only 28 is the perfect number. i.e. 28 = 1 + 2 + 4 + 7 + 14
A box contains a dozen bulbs in which few are defective and remaining are good. Which of the following cannot be a ratio of defective bulbs to good bulbs ?
1 : 1
1 : 2
1 : 3
1 : 4
There are three sections A, B and C in Class X with 25, 40 and 35 students respectively. The average marks obtained "by sections A, B and C are 70%, 65% and 50% respectively. The average marks of entire Class X is
60%
61%
61.66%
65%
Which evaluation involves gathering information about the students errors, reasons for those errors, depth of conceptual understanding, effective means of intervention ?
Diagnostic evaluation
Formative evaluation
Prognostic evaluation
Summative evaluation
If the sum of five successive integers are S, then the value of largest integer in terms of S will be
In a sports competition, 5 players are participating. It is compulsory for each player to play match with every other player. How many matches will be played?
10
12
16
20