1. Passage Reading
2. Verbal Logic
3. Non Verbal Logic
4. Numerical Logic
5. Data Interpretation
6. Reasoning
7. Analytical Ability
8. Quantitative Aptitude

177. c: Let S = Sample space

A = the event of drawing ‘2’ white balls.

B = the event of drawing ‘2’ red balls.

A B = The event of drawing 2 white balls or 2 red balls.

i.e. the event of drawing ‘2’ balls of same colour.

n(S) = 10C2 = 10/ (2x 8) = 45

n(A) = 6C2 = 6/ ((2x 4) = (6 x 5 ) / 2 = 15

n(B) = 4C2 = 4/ (2x 2) = (4x3) / 2 = 6

P(A) = n(A) / n(S) = 15/45 = 1/3

P(B) = n(B) / n(S) = 6/45 = 2/15

P(A B) = P(A) + P(B)

= 1/3 + 2/15 = (5+2) / 15

P(A B) = 7/15

178. c: Let ‘E1’, ‘E2’, ‘E3’ be the events of selections of A, B, and C respectively.
Let P(E3) = x

P(E2) = 3. P(E3) = 3x

and P(E1) = 2P(E2) = 2 x 3x = 6x

As there are only ‘3’ candidates ‘A’, ‘B’ and ‘C’ we have to select at least one of
the candidates
A or B or C, surely.

P( E1 E2 E3) = 1

and E1, E2, E3 are mutually exclusive.

P(E1 E2 E3) = P(E1) + P(E2) + P(E3)

1 = 6x + 3x + x

10x – 1 or x = 1/10

P(E3) = 1/10, P(E2) = 3/10 and P(E1) = 6/10 = 3/5

179. d: Total possible orders = starters x mains x deserts =4x5x3=60

180. c: The probability of calling correctly when a coin is tossed is p=1/2. The probability of getting it correctly three times is P=(1/2)x(1/2)x(1/2)=1/8

181. d: The probability of getting the first number correct is 1/5

The probability of getting the second number correct is ¼ since there are only 4
left

The probability of getting the third number correct is 1/3 since there are only 3 left

The probability of getting the fourth number correct is 1/2 since there are only 2
left

The probability of getting the fifth number correct is 1/1 since there are only 1 left

The probability of getting all five numbers is 1/5x1/4x1/3x1/2x1/1=1/120

In other words the number of permutations is simply factorial 5 or 5!

1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |

21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 |

41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 |

61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 |

81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 |

101 | 102 | 103 | 104 | 105 | 106 | 107 | 108 | 109 | 110 | 111 | 112 | 113 | 114 | 115 | 116 | 117 | 118 | 119 | 120 |

121 | 122 | 123 | 124 | 125 | 126 | 127 | 128 | 129 | 130 | 131 | 132 | 133 | 134 | 135 | 136 | 137 | 138 | 139 | 140 |

141 | 142 | 143 | 144 | 145 | 146 | 147 | 148 | 149 | 150 | 151 | 152 | 153 | 154 | 155 | 156 | 157 | 158 | 159 | 160 |

161 | 162 | 163 | 164 | 165 | 166 | 167 | 168 | 169 | 170 | 171 | 172 | 173 | 174 | 175 | 176 | 177 | 178 | 179 | 180 |

181 | 182 | 183 | 184 | 185 | 186 | 187 | 188 | 189 | 190 | 191 | 192 | 193 | 194 | 195 | 196 | 197 | 198 | 199 | 200 |

201 | 202 | 203 | 204 | 205 | 206 | 207 | 208 | 209 | 210 | 211 | 212 | 213 | 214 | 215 | 216 | 217 | 218 | 219 | 220 |

221 | 222 | 223 | 224 | 225 | 226 | 227 | 228 | 229 | 230 | 231 | 232 | 233 | 234 | 235 | 236 | 237 | 238 | 239 | 240 |

241 | 242 | 243 | 244 | 245 | 246 | 247 | 248 | 249 | 250 | 251 | 252 | 253 | 254 | 255 | 256 | 257 | 258 | 259 | 260 |

261 | 262 | 263 | 264 | 265 | 266 | 267 | 268 | 269 | 270 | 271 |