Please fast. I have exams Share with your friends Share 0 Abhishek Kumar answered this Dear Student, Numbers on cards=1,3,5,7X=4,6,8,10,12nS=12X=4 when we get 1,3 or 3,1P(X=4)=212X=6 when we get 1,5 or 5,1P(X=6)=212X=8 when we get 1,7 or 7,1 or 3,5 or 5,3P(X=8)=412X=10 when we have 3,7 or 7,3P(X=10)=212X=12 when we have 5,7 or 7,5P(X=12)=212Mean=∑ipixi=4212+6212+8412+10212+12212=1128+12+32+20+24=9612=8∑ipixi2=16212+36212+64412+100212+144212=11232+72+256+200+288=84812Varience=84812-82=70.666-64=6.666 Regards 0 View Full Answer