The arithmetic mean of the data $(x,f):(8,5),(10,8,(15,8),(20,4)$ is:
1). 12.5
2). 25
3). 12.4
4). 12.8
If $\left(\frac{1-i}{1+i}\right)^{n}$ = 1, then the smallest positive integer n is:
1). 4
2). 1
3). 2
4). 3
In a certain code, PAPER is written as QCSIW. How is HOSTEL written in the same code?
1). IQUXJQ
2). IQUXIR
3). IQVXIR
4). IQVXJR
With whom has the Union Govermnent of India entered into an agreement for flexible financing arrangement to
accelerate research towards early development of biopharmaceuticals under National Biopharma Mission?
1). WHO
2). UNICEF
3). IMF
4). World Bank
Two alloys A and B contain copper and zinc in the ratio 4 : 1 and 3 : 5, respectively. They are mixed in the ratio 9 : 4 to
get a new alloy C. What is the ratio of copper and zinc in alloy C?
1). 17 : 18
2). 13 : 12
3). 16 : 17
4). 87 : 43