Question
If 5 coins are tossed at a time what's the probability of
getting exactly one head?Solution
Number of ways to get exactly one head = 5 C 1 = 5
And total number of ways = 2 5 = 32
So probability = 5/32
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If √t + (1/√t) = 5, then find the value of t + (1/t).
If x = 15, find x5 - 16x4 + 16x3 - 16x2 + 16x - 16 = ?
4, 10, 19, 30, 43, ?
The mean age of 30 students was calculated as 15 years. However, it was later discovered that one student's age was mistakenly entered as 15 years inste...
25, 25.8, 27.4, 29, 33, 37
If a + b + c = 8, a² + b² + c² = 18 and ab + b c+ ca = 12, then what is the value of a³ + b³ +c³ –3abc?
If √e + (1/√e) = 10, then find the value of e + (1/e).
If, ( a + b = 8 ) and ( a² + b² = 40 ), then find the value of (a³ + b³).
If x2 = 15x + 1, then find the value of {x3 - (1/x3) }.