1甲射两次,击中一次的概率.
C(2,1)*0.5*0.5=2*0.5*0.5=0.5
2甲击中目标1次乙击中目标2次的概率.
C(2,1)*0.5*0.5*0.6^2=2*0.5*0.5*0.36=0.18
3乙射两次,至少击中一次的概率.
1-(1-0.6)^2=1-0.4^2=1-0.16=0.84
4甲比乙多击中目标的概率
(1-0.6)^2*(1-(1-0.5)^2) + C(2,1)*0.6*(1-0.6)*0.5^2
=0.16*(1-0.25)+0.48*0.25
=0.12 +0.12
=0.24