CBSC 12th Mathematics for Blind candidates Question Paper 2013 Free Download
CBSC Class 12th Mathematics for Blind candidates Question Paper 2013, CBSC Delhi Class 12th (XII) 2013 Mathematics for Blind candidates Question Paper CBSC Class XII Mathematics for Blind candidates Question Paper 2013 outside Delhi Students Free Download CBSC 12th – XII Mathematics for Blind candidates Question Paper for Foreign Students with Answers and Solution 2013 CBSC Board Exam Papers for Class 12 (XII) std CBSC 2013 Mathematics for Blind candidates Question Bank with Full Details.
Mathematics for Blind candidates
Time : 3 Hours
Maximum Marks : 100
1. In a group of 25 scientists, 15 are keen observers and do not commit errors in dealing with data whereas others, while they are hard working, shirk working with data. Two scientists are selected from the group at random. Find the probability distribution of number of scientists who are keen observers and do not commit error dealing with data. Also find mean of the distribution.
What value has been depicted in this question?
2. The mid-day meals to be provided to the students of primary schools is to be made from three foods A, B and C, which contain nutrients Vitamin A, Vitamin B and minerals, which are essential for the sound health of students, and are given in the table below:
Food | Nutrients per kg (in units) | ||
Vitamin A | Vitamin B | Minerals | |
A | 1 | 2 | 5 |
B | 3 | 1 | 1 |
C | 4 | 2 | 1 |
Using matrices, find the number of kg of foods A, B and C to be mixed to contain 15 units of Vitamin A, 9 units of Vitamin B and 14 units of minerals.
What value has been depicted in this question?
3. 75% students of a college reside in hostel and the remaining reside outside. There is a strict discipline in the hostel and fixed time for studies and other curricular activities, while college has no control on activities of students residing outside hostel. Last year results showed that 50% hostellers got A grade while 25% other students got A grade. At the end of the year, a student was selected at random and got A grade in the examination. What is the probability that the selected student was a hosteller?
Which value is reflected in this question?
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