The table shows information about the times, 1 seconds, taken by each of 100 students to solve a puzzle. Time (1 seconds)
0 < 10
103 15
15 * 15 20
20.1$ 40
40 < 75
Frequency
9
18
(a) Calculate an estimate of the mean time​

560

step-by-step explanation:

giggidy

option: d is the correct answer.

d) none of the above.

step-by-step explanation:

clearly from the figure attached to the question we could see that there is no shape given. hence without any shape given in the figure and after rotation we can't obtained a square pyramid.

since, to obtain a image we need a proper figure of the pre-image so that it can be transformed.

hence, the correct answer is:

d) none of the above.

step-by-step explanation:

b because it contains 40% of the possible results from the random list.  

0,1,2,3 v 4,5,6,7,8,9  

4 integers to 6 integers  

40% success vs 60% fail

step-by-step explanation: