There are two covers A and B each containing paper slips with natural numbers from 1 to 7 written on them. One slip isdrawn from each cover. Using them, a two digit number is formed with a number from A in the units place and the number from B in the tens place. How many such two digit numbers can be formed What is the probability that a two digit number so formed is even?
Answers
Step-by-step explanation:
no. of slip in cover A=7
no. of slip in cover B=7
numbers formed with a number from cover A in units place and a number from cover B are as follows
11 12 13 14 15. 16. 17
21 22. 23. 24. 25. 26. 27
31 32. 33. 34. 35. 36. 37
41. 42. 43. 44. 45. 46 47
51. 52. 53. 54. 55. 56. 57
61. 62. 63. 64. 65. 66. 67
71. 72. 73. 74. 75. 76. 77
total number of two digits number=7*7=49
number of two digits Even number=7*3=21
p(two digits number so formed is even)=21/49
=3/7