Q. 23.9( 13 Votes )
Two coins are tossed 400 times and we get
Two heads:112 times; one head 160 times ;0 times; 0 head :128 times.
When two coins are tossed at random, what is the probability of getting
(i) 2 heads? (ii) 1 heads? (iii) 0 head?
Answer :
Total number times coin tossed: 400
Number of times Two heads occurred: 112
Number of times One head occurred: 160
Number of times No head (zero head) occurred: 128
Probability P()=
(i). Let p(H1) be probability of getting Two heads
P (H1) =
P (H1) = = 0.28
(ii). Let p(H2) be probability of getting One head
P (H2) =
P (H2) = = 0.4
(iii). Let p(H3) be probability of getting No head
P (H3) =
P (H3) = = 0.32
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PREVIOUSA coin is tossed 500 times and we gethead : 285 times, tail :215 times.When a coin is tossed at random, what is the probability of getting(i) a head? (ii) a tail?NEXTThree coins are tossed 200 times and we getthree heads:39 times; two heads: 58 times;one head :67 times: 0 head: 36 times.When there coins are tossed at random, what is the probability of getting(i) 3 heads? (ii) 1 head? (iii) 0 head (iv) 2 heads?
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