Questions are based on the following data :

 Measurements of some variable X were made at an interval of 1 minute from 10 A.M. to 10:20 A.M. The data, thus, obtained is as follows :
X : 60,  62,  65,  64,  63,  61,  66,  65,  70,  68
 63,  62,  64,  69,  65,  64,  66,  67,  66,  64

1. The value of X, which is exceeded 10% of the time in the duration of measurement, is
 (A) 69
 (B) 68
 (C) 67
 (D) 66



2. The value of X, which is exceeded 90% of the time in the duration of measurement, is
(A) 63
 (B) 62
 (C) 61
 (D) 60



3. The value of X, which is exceeded 50% of the time in the duration of measurement, is
 (A) 66
 (B) 65
 (C) 64
 (D) 63